doc/fr_method_index.html

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    <title>Methods [inherit_views API Docs (e5ad25a)]</title>
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      <h1>Methods</h1>
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        /*  Prototype JavaScript framework, version 1.6.0.3
         *  (c) 2005-2008 Sam Stephenson
         *
         *  Prototype is freely distributable under the terms of an MIT-style license.
         *  For details, see the Prototype web site: http://www.prototypejs.org/
         *
         *--------------------------------------------------------------------------*/
        
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                value.valueOf = method.valueOf.bind(method);
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          isNumber: function(object) {
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          scan: function(pattern, iterator) {
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          truncate: function(length, truncation) {
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          strip: function() {
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          stripTags: function() {
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          succ: function() {
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          times: function(count) {
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          underscore: function() {
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          toJSON: function() {
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          unfilterJSON: function(filter) {
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          isJSON: function() {
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          evalJSON: function(sanitize) {
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          include: function(pattern) {
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          endsWith: function(pattern) {
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          empty: function() {
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          blank: function() {
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          interpolate: function(object, pattern) {
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        });
        
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          evaluate: function(object) {
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              var before = match[1] || '';
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              var ctx = object, expr = match[3];
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              while (match != null) {
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                ctx = ctx[comp];
                if (null == ctx || '' == match[3]) break;
                expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
                match = pattern.exec(expr);
              }
        
              return before + String.interpret(ctx);
            });
          }
        });
        Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;
        
        var $break = { };
        
        var Enumerable = {
          each: function(iterator, context) {
            var index = 0;
            try {
              this._each(function(value) {
                iterator.call(context, value, index++);
              });
            } catch (e) {
              if (e != $break) throw e;
            }
            return this;
          },
        
          eachSlice: function(number, iterator, context) {
            var index = -number, slices = [], array = this.toArray();
            if (number < 1) return array;
            while ((index += number) < array.length)
              slices.push(array.slice(index, index+number));
            return slices.collect(iterator, context);
          },
        
          all: function(iterator, context) {
            iterator = iterator || Prototype.K;
            var result = true;
            this.each(function(value, index) {
              result = result && !!iterator.call(context, value, index);
              if (!result) throw $break;
            });
            return result;
          },
        
          any: function(iterator, context) {
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            this.each(function(value, index) {
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                throw $break;
            });
            return result;
          },
        
          collect: function(iterator, context) {
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            var results = [];
            this.each(function(value, index) {
              results.push(iterator.call(context, value, index));
            });
            return results;
          },
        
          detect: function(iterator, context) {
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            this.each(function(value, index) {
              if (iterator.call(context, value, index)) {
                result = value;
                throw $break;
              }
            });
            return result;
          },
        
          findAll: function(iterator, context) {
            var results = [];
            this.each(function(value, index) {
              if (iterator.call(context, value, index))
                results.push(value);
            });
            return results;
          },
        
          grep: function(filter, iterator, context) {
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            var results = [];
        
            if (Object.isString(filter))
              filter = new RegExp(filter);
        
            this.each(function(value, index) {
              if (filter.match(value))
                results.push(iterator.call(context, value, index));
            });
            return results;
          },
        
          include: function(object) {
            if (Object.isFunction(this.indexOf))
              if (this.indexOf(object) != -1) return true;
        
            var found = false;
            this.each(function(value) {
              if (value == object) {
                found = true;
                throw $break;
              }
            });
            return found;
          },
        
          inGroupsOf: function(number, fillWith) {
            fillWith = Object.isUndefined(fillWith) ? null : fillWith;
            return this.eachSlice(number, function(slice) {
              while(slice.length < number) slice.push(fillWith);
              return slice;
            });
          },
        
          inject: function(memo, iterator, context) {
            this.each(function(value, index) {
              memo = iterator.call(context, memo, value, index);
            });
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          invoke: function(method) {
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            return this.map(function(value) {
              return value[method].apply(value, args);
            });
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          max: function(iterator, context) {
            iterator = iterator || Prototype.K;
            var result;
            this.each(function(value, index) {
              value = iterator.call(context, value, index);
              if (result == null || value >= result)
                result = value;
            });
            return result;
          },
        
          min: function(iterator, context) {
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            var result;
            this.each(function(value, index) {
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              if (result == null || value < result)
                result = value;
            });
            return result;
          },
        
          partition: function(iterator, context) {
            iterator = iterator || Prototype.K;
            var trues = [], falses = [];
            this.each(function(value, index) {
              (iterator.call(context, value, index) ?
                trues : falses).push(value);
            });
            return [trues, falses];
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          pluck: function(property) {
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            this.each(function(value) {
              results.push(value[property]);
            });
            return results;
          },
        
          reject: function(iterator, context) {
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            this.each(function(value, index) {
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          sortBy: function(iterator, context) {
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                criteria: iterator.call(context, value, index)
              };
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          toArray: function() {
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          zip: function() {
            var iterator = Prototype.K, args = $A(arguments);
            if (Object.isFunction(args.last()))
              iterator = args.pop();
        
            var collections = [this].concat(args).map($A);
            return this.map(function(value, index) {
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            });
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          size: function() {
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          },
        
          inspect: function() {
            return '#<Enumerable:' + this.toArray().inspect() + '>';
          }
        };
        
        Object.extend(Enumerable, {
          map:     Enumerable.collect,
          find:    Enumerable.detect,
          select:  Enumerable.findAll,
          filter:  Enumerable.findAll,
          member:  Enumerable.include,
          entries: Enumerable.toArray,
          every:   Enumerable.all,
          some:    Enumerable.any
        });
        function $A(iterable) {
          if (!iterable) return [];
          if (iterable.toArray) return iterable.toArray();
          var length = iterable.length || 0, results = new Array(length);
          while (length--) results[length] = iterable[length];
          return results;
        }
        
        if (Prototype.Browser.WebKit) {
          $A = function(iterable) {
            if (!iterable) return [];
            // In Safari, only use the `toArray` method if it's not a NodeList.
            // A NodeList is a function, has an function `item` property, and a numeric
            // `length` property. Adapted from Google Doctype.
            if (!(typeof iterable === 'function' && typeof iterable.length ===
                'number' && typeof iterable.item === 'function') && iterable.toArray)
              return iterable.toArray();
            var length = iterable.length || 0, results = new Array(length);
            while (length--) results[length] = iterable[length];
            return results;
          };
        }
        
        Array.from = $A;
        
        Object.extend(Array.prototype, Enumerable);
        
        if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;
        
        Object.extend(Array.prototype, {
          _each: function(iterator) {
            for (var i = 0, length = this.length; i < length; i++)
              iterator(this[i]);
          },
        
          clear: function() {
            this.length = 0;
            return this;
          },
        
          first: function() {
            return this[0];
          },
        
          last: function() {
            return this[this.length - 1];
          },
        
          compact: function() {
            return this.select(function(value) {
              return value != null;
            });
          },
        
          flatten: function() {
            return this.inject([], function(array, value) {
              return array.concat(Object.isArray(value) ?
                value.flatten() : [value]);
            });
          },
        
          without: function() {
            var values = $A(arguments);
            return this.select(function(value) {
              return !values.include(value);
            });
          },
        
          reverse: function(inline) {
            return (inline !== false ? this : this.toArray())._reverse();
          },
        
          reduce: function() {
            return this.length > 1 ? this : this[0];
          },
        
          uniq: function(sorted) {
            return this.inject([], function(array, value, index) {
              if (0 == index || (sorted ? array.last() != value : !array.include(value)))
                array.push(value);
              return array;
            });
          },
        
          intersect: function(array) {
            return this.uniq().findAll(function(item) {
              return array.detect(function(value) { return item === value });
            });
          },
        
          clone: function() {
            return [].concat(this);
          },
        
          size: function() {
            return this.length;
          },
        
          inspect: function() {
            return '[' + this.map(Object.inspect).join(', ') + ']';
          },
        
          toJSON: function() {
            var results = [];
            this.each(function(object) {
              var value = Object.toJSON(object);
              if (!Object.isUndefined(value)) results.push(value);
            });
            return '[' + results.join(', ') + ']';
          }
        });
        
        // use native browser JS 1.6 implementation if available
        if (Object.isFunction(Array.prototype.forEach))
          Array.prototype._each = Array.prototype.forEach;
        
        if (!Array.prototype.indexOf) Array.prototype.indexOf = function(item, i) {
          i || (i = 0);
          var length = this.length;
          if (i < 0) i = length + i;
          for (; i < length; i++)
            if (this[i] === item) return i;
          return -1;
        };
        
        if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(item, i) {
          i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
          var n = this.slice(0, i).reverse().indexOf(item);
          return (n < 0) ? n : i - n - 1;
        };
        
        Array.prototype.toArray = Array.prototype.clone;
        
        function $w(string) {
          if (!Object.isString(string)) return [];
          string = string.strip();
          return string ? string.split(/\s+/) : [];
        }
        
        if (Prototype.Browser.Opera){
          Array.prototype.concat = function() {
            var array = [];
            for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
            for (var i = 0, length = arguments.length; i < length; i++) {
              if (Object.isArray(arguments[i])) {
                for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
                  array.push(arguments[i][j]);
              } else {
                array.push(arguments[i]);
              }
            }
            return array;
          };
        }
        Object.extend(Number.prototype, {
          toColorPart: function() {
            return this.toPaddedString(2, 16);
          },
        
          succ: function() {
            return this + 1;
          },
        
          times: function(iterator, context) {
            $R(0, this, true).each(iterator, context);
            return this;
          },
        
          toPaddedString: function(length, radix) {
            var string = this.toString(radix || 10);
            return '0'.times(length - string.length) + string;
          },
        
          toJSON: function() {
            return isFinite(this) ? this.toString() : 'null';
          }
        });
        
        $w('abs round ceil floor').each(function(method){
          Number.prototype[method] = Math[method].methodize();
        });
        function $H(object) {
          return new Hash(object);
        };
        
        var Hash = Class.create(Enumerable, (function() {
        
          function toQueryPair(key, value) {
            if (Object.isUndefined(value)) return key;
            return key + '=' + encodeURIComponent(String.interpret(value));
          }
        
          return {
            initialize: function(object) {
              this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
            },
        
            _each: function(iterator) {
              for (var key in this._object) {
                var value = this._object[key], pair = [key, value];
                pair.key = key;
                pair.value = value;
                iterator(pair);
              }
            },
        
            set: function(key, value) {
              return this._object[key] = value;
            },
        
            get: function(key) {
              // simulating poorly supported hasOwnProperty
              if (this._object[key] !== Object.prototype[key])
                return this._object[key];
            },
        
            unset: function(key) {
              var value = this._object[key];
              delete this._object[key];
              return value;
            },
        
            toObject: function() {
              return Object.clone(this._object);
            },
        
            keys: function() {
              return this.pluck('key');
            },
        
            values: function() {
              return this.pluck('value');
            },
        
            index: function(value) {
              var match = this.detect(function(pair) {
                return pair.value === value;
              });
              return match && match.key;
            },
        
            merge: function(object) {
              return this.clone().update(object);
            },
        
            update: function(object) {
              return new Hash(object).inject(this, function(result, pair) {
                result.set(pair.key, pair.value);
                return result;
              });
            },
        
            toQueryString: function() {
              return this.inject([], function(results, pair) {
                var key = encodeURIComponent(pair.key), values = pair.value;
        
                if (values && typeof values == 'object') {
                  if (Object.isArray(values))
                    return results.concat(values.map(toQueryPair.curry(key)));
                } else results.push(toQueryPair(key, values));
                return results;
              }).join('&');
            },
        
            inspect: function() {
              return '#<Hash:{' + this.map(function(pair) {
                return pair.map(Object.inspect).join(': ');
              }).join(', ') + '}>';
            },
        
            toJSON: function() {
              return Object.toJSON(this.toObject());
            },
        
            clone: function() {
              return new Hash(this);
            }
          }
        })());
        
        Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
        Hash.from = $H;
        var ObjectRange = Class.create(Enumerable, {
          initialize: function(start, end, exclusive) {
            this.start = start;
            this.end = end;
            this.exclusive = exclusive;
          },
        
          _each: function(iterator) {
            var value = this.start;
            while (this.include(value)) {
              iterator(value);
              value = value.succ();
            }
          },
        
          include: function(value) {
            if (value < this.start)
              return false;
            if (this.exclusive)
              return value < this.end;
            return value <= this.end;
          }
        });
        
        var $R = function(start, end, exclusive) {
          return new ObjectRange(start, end, exclusive);
        };
        
        var Ajax = {
          getTransport: function() {
            return Try.these(
              function() {return new XMLHttpRequest()},
              function() {return new ActiveXObject('Msxml2.XMLHTTP')},
              function() {return new ActiveXObject('Microsoft.XMLHTTP')}
            ) || false;
          },
        
          activeRequestCount: 0
        };
        
        Ajax.Responders = {
          responders: [],
        
          _each: function(iterator) {
            this.responders._each(iterator);
          },
        
          register: function(responder) {
            if (!this.include(responder))
              this.responders.push(responder);
          },
        
          unregister: function(responder) {
            this.responders = this.responders.without(responder);
          },
        
          dispatch: function(callback, request, transport, json) {
            this.each(function(responder) {
              if (Object.isFunction(responder[callback])) {
                try {
                  responder[callback].apply(responder, [request, transport, json]);
                } catch (e) { }
              }
            });
          }
        };
        
        Object.extend(Ajax.Responders, Enumerable);
        
        Ajax.Responders.register({
          onCreate:   function() { Ajax.activeRequestCount++ },
          onComplete: function() { Ajax.activeRequestCount-- }
        });
        
        Ajax.Base = Class.create({
          initialize: function(options) {
            this.options = {
              method:       'post',
              asynchronous: true,
              contentType:  'application/x-www-form-urlencoded',
              encoding:     'UTF-8',
              parameters:   '',
              evalJSON:     true,
              evalJS:       true
            };
            Object.extend(this.options, options || { });
        
            this.options.method = this.options.method.toLowerCase();
        
            if (Object.isString(this.options.parameters))
              this.options.parameters = this.options.parameters.toQueryParams();
            else if (Object.isHash(this.options.parameters))
              this.options.parameters = this.options.parameters.toObject();
          }
        });
        
        Ajax.Request = Class.create(Ajax.Base, {
          _complete: false,
        
          initialize: function($super, url, options) {
            $super(options);
            this.transport = Ajax.getTransport();
            this.request(url);
          },
        
          request: function(url) {
            this.url = url;
            this.method = this.options.method;
            var params = Object.clone(this.options.parameters);
        
            if (!['get', 'post'].include(this.method)) {
              // simulate other verbs over post
              params['_method'] = this.method;
              this.method = 'post';
            }
        
            this.parameters = params;
        
            if (params = Object.toQueryString(params)) {
              // when GET, append parameters to URL
              if (this.method == 'get')
                this.url += (this.url.include('?') ? '&' : '?') + params;
              else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
                params += '&_=';
            }
        
            try {
              var response = new Ajax.Response(this);
              if (this.options.onCreate) this.options.onCreate(response);
              Ajax.Responders.dispatch('onCreate', this, response);
        
              this.transport.open(this.method.toUpperCase(), this.url,
                this.options.asynchronous);
        
              if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);
        
              this.transport.onreadystatechange = this.onStateChange.bind(this);
              this.setRequestHeaders();
        
              this.body = this.method == 'post' ? (this.options.postBody || params) : null;
              this.transport.send(this.body);
        
              /* Force Firefox to handle ready state 4 for synchronous requests */
              if (!this.options.asynchronous && this.transport.overrideMimeType)
                this.onStateChange();
        
            }
            catch (e) {
              this.dispatchException(e);
            }
          },
        
          onStateChange: function() {
            var readyState = this.transport.readyState;
            if (readyState > 1 && !((readyState == 4) && this._complete))
              this.respondToReadyState(this.transport.readyState);
          },
        
          setRequestHeaders: function() {
            var headers = {
              'X-Requested-With': 'XMLHttpRequest',
              'X-Prototype-Version': Prototype.Version,
              'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
            };
        
            if (this.method == 'post') {
              headers['Content-type'] = this.options.contentType +
                (this.options.encoding ? '; charset=' + this.options.encoding : '');
        
              /* Force "Connection: close" for older Mozilla browsers to work
               * around a bug where XMLHttpRequest sends an incorrect
               * Content-length header. See Mozilla Bugzilla #246651.
               */
              if (this.transport.overrideMimeType &&
                  (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
                    headers['Connection'] = 'close';
            }
        
            // user-defined headers
            if (typeof this.options.requestHeaders == 'object') {
              var extras = this.options.requestHeaders;
        
              if (Object.isFunction(extras.push))
                for (var i = 0, length = extras.length; i < length; i += 2)
                  headers[extras[i]] = extras[i+1];
              else
                $H(extras).each(function(pair) { headers[pair.key] = pair.value });
            }
        
            for (var name in headers)
              this.transport.setRequestHeader(name, headers[name]);
          },
        
          success: function() {
            var status = this.getStatus();
            return !status || (status >= 200 && status < 300);
          },
        
          getStatus: function() {
            try {
              return this.transport.status || 0;
            } catch (e) { return 0 }
          },
        
          respondToReadyState: function(readyState) {
            var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);
        
            if (state == 'Complete') {
              try {
                this._complete = true;
                (this.options['on' + response.status]
                 || this.options['on' + (this.success() ? 'Success' : 'Failure')]
                 || Prototype.emptyFunction)(response, response.headerJSON);
              } catch (e) {
                this.dispatchException(e);
              }
        
              var contentType = response.getHeader('Content-type');
              if (this.options.evalJS == 'force'
                  || (this.options.evalJS && this.isSameOrigin() && contentType
                  && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
                this.evalResponse();
            }
        
            try {
              (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
              Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
            } catch (e) {
              this.dispatchException(e);
            }
        
            if (state == 'Complete') {
              // avoid memory leak in MSIE: clean up
              this.transport.onreadystatechange = Prototype.emptyFunction;
            }
          },
        
          isSameOrigin: function() {
            var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
            return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
              protocol: location.protocol,
              domain: document.domain,
              port: location.port ? ':' + location.port : ''
            }));
          },
        
          getHeader: function(name) {
            try {
              return this.transport.getResponseHeader(name) || null;
            } catch (e) { return null }
          },
        
          evalResponse: function() {
            try {
              return eval((this.transport.responseText || '').unfilterJSON());
            } catch (e) {
              this.dispatchException(e);
            }
          },
        
          dispatchException: function(exception) {
            (this.options.onException || Prototype.emptyFunction)(this, exception);
            Ajax.Responders.dispatch('onException', this, exception);
          }
        });
        
        Ajax.Request.Events =
          ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
        
        Ajax.Response = Class.create({
          initialize: function(request){
            this.request = request;
            var transport  = this.transport  = request.transport,
                readyState = this.readyState = transport.readyState;
        
            if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
              this.status       = this.getStatus();
              this.statusText   = this.getStatusText();
              this.responseText = String.interpret(transport.responseText);
              this.headerJSON   = this._getHeaderJSON();
            }
        
            if(readyState == 4) {
              var xml = transport.responseXML;
              this.responseXML  = Object.isUndefined(xml) ? null : xml;
              this.responseJSON = this._getResponseJSON();
            }
          },
        
          status:      0,
          statusText: '',
        
          getStatus: Ajax.Request.prototype.getStatus,
        
          getStatusText: function() {
            try {
              return this.transport.statusText || '';
            } catch (e) { return '' }
          },
        
          getHeader: Ajax.Request.prototype.getHeader,
        
          getAllHeaders: function() {
            try {
              return this.getAllResponseHeaders();
            } catch (e) { return null }
          },
        
          getResponseHeader: function(name) {
            return this.transport.getResponseHeader(name);
          },
        
          getAllResponseHeaders: function() {
            return this.transport.getAllResponseHeaders();
          },
        
          _getHeaderJSON: function() {
            var json = this.getHeader('X-JSON');
            if (!json) return null;
            json = decodeURIComponent(escape(json));
            try {
              return json.evalJSON(this.request.options.sanitizeJSON ||
                !this.request.isSameOrigin());
            } catch (e) {
              this.request.dispatchException(e);
            }
          },
        
          _getResponseJSON: function() {
            var options = this.request.options;
            if (!options.evalJSON || (options.evalJSON != 'force' &&
              !(this.getHeader('Content-type') || '').include('application/json')) ||
                this.responseText.blank())
                  return null;
            try {
              return this.responseText.evalJSON(options.sanitizeJSON ||
                !this.request.isSameOrigin());
            } catch (e) {
              this.request.dispatchException(e);
            }
          }
        });
        
        Ajax.Updater = Class.create(Ajax.Request, {
          initialize: function($super, container, url, options) {
            this.container = {
              success: (container.success || container),
              failure: (container.failure || (container.success ? null : container))
            };
        
            options = Object.clone(options);
            var onComplete = options.onComplete;
            options.onComplete = (function(response, json) {
              this.updateContent(response.responseText);
              if (Object.isFunction(onComplete)) onComplete(response, json);
            }).bind(this);
        
            $super(url, options);
          },
        
          updateContent: function(responseText) {
            var receiver = this.container[this.success() ? 'success' : 'failure'],
                options = this.options;
        
            if (!options.evalScripts) responseText = responseText.stripScripts();
        
            if (receiver = $(receiver)) {
              if (options.insertion) {
                if (Object.isString(options.insertion)) {
                  var insertion = { }; insertion[options.insertion] = responseText;
                  receiver.insert(insertion);
                }
                else options.insertion(receiver, responseText);
              }
              else receiver.update(responseText);
            }
          }
        });
        
        Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
          initialize: function($super, container, url, options) {
            $super(options);
            this.onComplete = this.options.onComplete;
        
            this.frequency = (this.options.frequency || 2);
            this.decay = (this.options.decay || 1);
        
            this.updater = { };
            this.container = container;
            this.url = url;
        
            this.start();
          },
        
          start: function() {
            this.options.onComplete = this.updateComplete.bind(this);
            this.onTimerEvent();
          },
        
          stop: function() {
            this.updater.options.onComplete = undefined;
            clearTimeout(this.timer);
            (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
          },
        
          updateComplete: function(response) {
            if (this.options.decay) {
              this.decay = (response.responseText == this.lastText ?
                this.decay * this.options.decay : 1);
        
              this.lastText = response.responseText;
            }
            this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
          },
        
          onTimerEvent: function() {
            this.updater = new Ajax.Updater(this.container, this.url, this.options);
          }
        });
        function $(element) {
          if (arguments.length > 1) {
            for (var i = 0, elements = [], length = arguments.length; i < length; i++)
              elements.push($(arguments[i]));
            return elements;
          }
          if (Object.isString(element))
            element = document.getElementById(element);
          return Element.extend(element);
        }
        
        if (Prototype.BrowserFeatures.XPath) {
          document._getElementsByXPath = function(expression, parentElement) {
            var results = [];
            var query = document.evaluate(expression, $(parentElement) || document,
              null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
            for (var i = 0, length = query.snapshotLength; i < length; i++)
              results.push(Element.extend(query.snapshotItem(i)));
            return results;
          };
        }
        
        /*--------------------------------------------------------------------------*/
        
        if (!window.Node) var Node = { };
        
        if (!Node.ELEMENT_NODE) {
          // DOM level 2 ECMAScript Language Binding
          Object.extend(Node, {
            ELEMENT_NODE: 1,
            ATTRIBUTE_NODE: 2,
            TEXT_NODE: 3,
            CDATA_SECTION_NODE: 4,
            ENTITY_REFERENCE_NODE: 5,
            ENTITY_NODE: 6,
            PROCESSING_INSTRUCTION_NODE: 7,
            COMMENT_NODE: 8,
            DOCUMENT_NODE: 9,
            DOCUMENT_TYPE_NODE: 10,
            DOCUMENT_FRAGMENT_NODE: 11,
            NOTATION_NODE: 12
          });
        }
        
        (function() {
          var element = this.Element;
          this.Element = function(tagName, attributes) {
            attributes = attributes || { };
            tagName = tagName.toLowerCase();
            var cache = Element.cache;
            if (Prototype.Browser.IE && attributes.name) {
              tagName = '<' + tagName + ' name="' + attributes.name + '">';
              delete attributes.name;
              return Element.writeAttribute(document.createElement(tagName), attributes);
            }
            if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
            return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
          };
          Object.extend(this.Element, element || { });
          if (element) this.Element.prototype = element.prototype;
        }).call(window);
        
        Element.cache = { };
        
        Element.Methods = {
          visible: function(element) {
            return $(element).style.display != 'none';
          },
        
          toggle: function(element) {
            element = $(element);
            Element[Element.visible(element) ? 'hide' : 'show'](element);
            return element;
          },
        
          hide: function(element) {
            element = $(element);
            element.style.display = 'none';
            return element;
          },
        
          show: function(element) {
            element = $(element);
            element.style.display = '';
            return element;
          },
        
          remove: function(element) {
            element = $(element);
            element.parentNode.removeChild(element);
            return element;
          },
        
          update: function(element, content) {
            element = $(element);
            if (content && content.toElement) content = content.toElement();
            if (Object.isElement(content)) return element.update().insert(content);
            content = Object.toHTML(content);
            element.innerHTML = content.stripScripts();
            content.evalScripts.bind(content).defer();
            return element;
          },
        
          replace: function(element, content) {
            element = $(element);
            if (content && content.toElement) content = content.toElement();
            else if (!Object.isElement(content)) {
              content = Object.toHTML(content);
              var range = element.ownerDocument.createRange();
              range.selectNode(element);
              content.evalScripts.bind(content).defer();
              content = range.createContextualFragment(content.stripScripts());
            }
            element.parentNode.replaceChild(content, element);
            return element;
          },
        
          insert: function(element, insertions) {
            element = $(element);
        
            if (Object.isString(insertions) || Object.isNumber(insertions) ||
                Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
                  insertions = {bottom:insertions};
        
            var content, insert, tagName, childNodes;
        
            for (var position in insertions) {
              content  = insertions[position];
              position = position.toLowerCase();
              insert = Element._insertionTranslations[position];
        
              if (content && content.toElement) content = content.toElement();
              if (Object.isElement(content)) {
                insert(element, content);
                continue;
              }
        
              content = Object.toHTML(content);
        
              tagName = ((position == 'before' || position == 'after')
                ? element.parentNode : element).tagName.toUpperCase();
        
              childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
        
              if (position == 'top' || position == 'after') childNodes.reverse();
              childNodes.each(insert.curry(element));
        
              content.evalScripts.bind(content).defer();
            }
        
            return element;
          },
        
          wrap: function(element, wrapper, attributes) {
            element = $(element);
            if (Object.isElement(wrapper))
              $(wrapper).writeAttribute(attributes || { });
            else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
            else wrapper = new Element('div', wrapper);
            if (element.parentNode)
              element.parentNode.replaceChild(wrapper, element);
            wrapper.appendChild(element);
            return wrapper;
          },
        
          inspect: function(element) {
            element = $(element);
            var result = '<' + element.tagName.toLowerCase();
            $H({'id': 'id', 'className': 'class'}).each(function(pair) {
              var property = pair.first(), attribute = pair.last();
              var value = (element[property] || '').toString();
              if (value) result += ' ' + attribute + '=' + value.inspect(true);
            });
            return result + '>';
          },
        
          recursivelyCollect: function(element, property) {
            element = $(element);
            var elements = [];
            while (element = element[property])
              if (element.nodeType == 1)
                elements.push(Element.extend(element));
            return elements;
          },
        
          ancestors: function(element) {
            return $(element).recursivelyCollect('parentNode');
          },
        
          descendants: function(element) {
            return $(element).select("*");
          },
        
          firstDescendant: function(element) {
            element = $(element).firstChild;
            while (element && element.nodeType != 1) element = element.nextSibling;
            return $(element);
          },
        
          immediateDescendants: function(element) {
            if (!(element = $(element).firstChild)) return [];
            while (element && element.nodeType != 1) element = element.nextSibling;
            if (element) return [element].concat($(element).nextSiblings());
            return [];
          },
        
          previousSiblings: function(element) {
            return $(element).recursivelyCollect('previousSibling');
          },
        
          nextSiblings: function(element) {
            return $(element).recursivelyCollect('nextSibling');
          },
        
          siblings: function(element) {
            element = $(element);
            return element.previousSiblings().reverse().concat(element.nextSiblings());
          },
        
          match: function(element, selector) {
            if (Object.isString(selector))
              selector = new Selector(selector);
            return selector.match($(element));
          },
        
          up: function(element, expression, index) {
            element = $(element);
            if (arguments.length == 1) return $(element.parentNode);
            var ancestors = element.ancestors();
            return Object.isNumber(expression) ? ancestors[expression] :
              Selector.findElement(ancestors, expression, index);
          },
        
          down: function(element, expression, index) {
            element = $(element);
            if (arguments.length == 1) return element.firstDescendant();
            return Object.isNumber(expression) ? element.descendants()[expression] :
              Element.select(element, expression)[index || 0];
          },
        
          previous: function(element, expression, index) {
            element = $(element);
            if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
            var previousSiblings = element.previousSiblings();
            return Object.isNumber(expression) ? previousSiblings[expression] :
              Selector.findElement(previousSiblings, expression, index);
          },
        
          next: function(element, expression, index) {
            element = $(element);
            if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
            var nextSiblings = element.nextSiblings();
            return Object.isNumber(expression) ? nextSiblings[expression] :
              Selector.findElement(nextSiblings, expression, index);
          },
        
          select: function() {
            var args = $A(arguments), element = $(args.shift());
            return Selector.findChildElements(element, args);
          },
        
          adjacent: function() {
            var args = $A(arguments), element = $(args.shift());
            return Selector.findChildElements(element.parentNode, args).without(element);
          },
        
          identify: function(element) {
            element = $(element);
            var id = element.readAttribute('id'), self = arguments.callee;
            if (id) return id;
            do { id = 'anonymous_element_' + self.counter++ } while ($(id));
            element.writeAttribute('id', id);
            return id;
          },
        
          readAttribute: function(element, name) {
            element = $(element);
            if (Prototype.Browser.IE) {
              var t = Element._attributeTranslations.read;
              if (t.values[name]) return t.values[name](element, name);
              if (t.names[name]) name = t.names[name];
              if (name.include(':')) {
                return (!element.attributes || !element.attributes[name]) ? null :
                 element.attributes[name].value;
              }
            }
            return element.getAttribute(name);
          },
        
          writeAttribute: function(element, name, value) {
            element = $(element);
            var attributes = { }, t = Element._attributeTranslations.write;
        
            if (typeof name == 'object') attributes = name;
            else attributes[name] = Object.isUndefined(value) ? true : value;
        
            for (var attr in attributes) {
              name = t.names[attr] || attr;
              value = attributes[attr];
              if (t.values[attr]) name = t.values[attr](element, value);
              if (value === false || value === null)
                element.removeAttribute(name);
              else if (value === true)
                element.setAttribute(name, name);
              else element.setAttribute(name, value);
            }
            return element;
          },
        
          getHeight: function(element) {
            return $(element).getDimensions().height;
          },
        
          getWidth: function(element) {
            return $(element).getDimensions().width;
          },
        
          classNames: function(element) {
            return new Element.ClassNames(element);
          },
        
          hasClassName: function(element, className) {
            if (!(element = $(element))) return;
            var elementClassName = element.className;
            return (elementClassName.length > 0 && (elementClassName == className ||
              new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
          },
        
          addClassName: function(element, className) {
            if (!(element = $(element))) return;
            if (!element.hasClassName(className))
              element.className += (element.className ? ' ' : '') + className;
            return element;
          },
        
          removeClassName: function(element, className) {
            if (!(element = $(element))) return;
            element.className = element.className.replace(
              new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
            return element;
          },
        
          toggleClassName: function(element, className) {
            if (!(element = $(element))) return;
            return element[element.hasClassName(className) ?
              'removeClassName' : 'addClassName'](className);
          },
        
          // removes whitespace-only text node children
          cleanWhitespace: function(element) {
            element = $(element);
            var node = element.firstChild;
            while (node) {
              var nextNode = node.nextSibling;
              if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
                element.removeChild(node);
              node = nextNode;
            }
            return element;
          },
        
          empty: function(element) {
            return $(element).innerHTML.blank();
          },
        
          descendantOf: function(element, ancestor) {
            element = $(element), ancestor = $(ancestor);
        
            if (element.compareDocumentPosition)
              return (element.compareDocumentPosition(ancestor) & 8) === 8;
        
            if (ancestor.contains)
              return ancestor.contains(element) && ancestor !== element;
        
            while (element = element.parentNode)
              if (element == ancestor) return true;
        
            return false;
          },
        
          scrollTo: function(element) {
            element = $(element);
            var pos = element.cumulativeOffset();
            window.scrollTo(pos[0], pos[1]);
            return element;
          },
        
          getStyle: function(element, style) {
            element = $(element);
            style = style == 'float' ? 'cssFloat' : style.camelize();
            var value = element.style[style];
            if (!value || value == 'auto') {
              var css = document.defaultView.getComputedStyle(element, null);
              value = css ? css[style] : null;
            }
            if (style == 'opacity') return value ? parseFloat(value) : 1.0;
            return value == 'auto' ? null : value;
          },
        
          getOpacity: function(element) {
            return $(element).getStyle('opacity');
          },
        
          setStyle: function(element, styles) {
            element = $(element);
            var elementStyle = element.style, match;
            if (Object.isString(styles)) {
              element.style.cssText += ';' + styles;
              return styles.include('opacity') ?
                element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
            }
            for (var property in styles)
              if (property == 'opacity') element.setOpacity(styles[property]);
              else
                elementStyle[(property == 'float' || property == 'cssFloat') ?
                  (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
                    property] = styles[property];
        
            return element;
          },
        
          setOpacity: function(element, value) {
            element = $(element);
            element.style.opacity = (value == 1 || value === '') ? '' :
              (value < 0.00001) ? 0 : value;
            return element;
          },
        
          getDimensions: function(element) {
            element = $(element);
            var display = element.getStyle('display');
            if (display != 'none' && display != null) // Safari bug
              return {width: element.offsetWidth, height: element.offsetHeight};
        
            // All *Width and *Height properties give 0 on elements with display none,
            // so enable the element temporarily
            var els = element.style;
            var originalVisibility = els.visibility;
            var originalPosition = els.position;
            var originalDisplay = els.display;
            els.visibility = 'hidden';
            els.position = 'absolute';
            els.display = 'block';
            var originalWidth = element.clientWidth;
            var originalHeight = element.clientHeight;
            els.display = originalDisplay;
            els.position = originalPosition;
            els.visibility = originalVisibility;
            return {width: originalWidth, height: originalHeight};
          },
        
          makePositioned: function(element) {
            element = $(element);
            var pos = Element.getStyle(element, 'position');
            if (pos == 'static' || !pos) {
              element._madePositioned = true;
              element.style.position = 'relative';
              // Opera returns the offset relative to the positioning context, when an
              // element is position relative but top and left have not been defined
              if (Prototype.Browser.Opera) {
                element.style.top = 0;
                element.style.left = 0;
              }
            }
            return element;
          },
        
          undoPositioned: function(element) {
            element = $(element);
            if (element._madePositioned) {
              element._madePositioned = undefined;
              element.style.position =
                element.style.top =
                element.style.left =
                element.style.bottom =
                element.style.right = '';
            }
            return element;
          },
        
          makeClipping: function(element) {
            element = $(element);
            if (element._overflow) return element;
            element._overflow = Element.getStyle(element, 'overflow') || 'auto';
            if (element._overflow !== 'hidden')
              element.style.overflow = 'hidden';
            return element;
          },
        
          undoClipping: function(element) {
            element = $(element);
            if (!element._overflow) return element;
            element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
            element._overflow = null;
            return element;
          },
        
          cumulativeOffset: function(element) {
            var valueT = 0, valueL = 0;
            do {
              valueT += element.offsetTop  || 0;
              valueL += element.offsetLeft || 0;
              element = element.offsetParent;
            } while (element);
            return Element._returnOffset(valueL, valueT);
          },
        
          positionedOffset: function(element) {
            var valueT = 0, valueL = 0;
            do {
              valueT += element.offsetTop  || 0;
              valueL += element.offsetLeft || 0;
              element = element.offsetParent;
              if (element) {
                if (element.tagName.toUpperCase() == 'BODY') break;
                var p = Element.getStyle(element, 'position');
                if (p !== 'static') break;
              }
            } while (element);
            return Element._returnOffset(valueL, valueT);
          },
        
          absolutize: function(element) {
            element = $(element);
            if (element.getStyle('position') == 'absolute') return element;
            // Position.prepare(); // To be done manually by Scripty when it needs it.
        
            var offsets = element.positionedOffset();
            var top     = offsets[1];
            var left    = offsets[0];
            var width   = element.clientWidth;
            var height  = element.clientHeight;
        
            element._originalLeft   = left - parseFloat(element.style.left  || 0);
            element._originalTop    = top  - parseFloat(element.style.top || 0);
            element._originalWidth  = element.style.width;
            element._originalHeight = element.style.height;
        
            element.style.position = 'absolute';
            element.style.top    = top + 'px';
            element.style.left   = left + 'px';
            element.style.width  = width + 'px';
            element.style.height = height + 'px';
            return element;
          },
        
          relativize: function(element) {
            element = $(element);
            if (element.getStyle('position') == 'relative') return element;
            // Position.prepare(); // To be done manually by Scripty when it needs it.
        
            element.style.position = 'relative';
            var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
            var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);
        
            element.style.top    = top + 'px';
            element.style.left   = left + 'px';
            element.style.height = element._originalHeight;
            element.style.width  = element._originalWidth;
            return element;
          },
        
          cumulativeScrollOffset: function(element) {
            var valueT = 0, valueL = 0;
            do {
              valueT += element.scrollTop  || 0;
              valueL += element.scrollLeft || 0;
              element = element.parentNode;
            } while (element);
            return Element._returnOffset(valueL, valueT);
          },
        
          getOffsetParent: function(element) {
            if (element.offsetParent) return $(element.offsetParent);
            if (element == document.body) return $(element);
        
            while ((element = element.parentNode) && element != document.body)
              if (Element.getStyle(element, 'position') != 'static')
                return $(element);
        
            return $(document.body);
          },
        
          viewportOffset: function(forElement) {
            var valueT = 0, valueL = 0;
        
            var element = forElement;
            do {
              valueT += element.offsetTop  || 0;
              valueL += element.offsetLeft || 0;
        
              // Safari fix
              if (element.offsetParent == document.body &&
                Element.getStyle(element, 'position') == 'absolute') break;
        
            } while (element = element.offsetParent);
        
            element = forElement;
            do {
              if (!Prototype.Browser.Opera || (element.tagName && (element.tagName.toUpperCase() == 'BODY'))) {
                valueT -= element.scrollTop  || 0;
                valueL -= element.scrollLeft || 0;
              }
            } while (element = element.parentNode);
        
            return Element._returnOffset(valueL, valueT);
          },
        
          clonePosition: function(element, source) {
            var options = Object.extend({
              setLeft:    true,
              setTop:     true,
              setWidth:   true,
              setHeight:  true,
              offsetTop:  0,
              offsetLeft: 0
            }, arguments[2] || { });
        
            // find page position of source
            source = $(source);
            var p = source.viewportOffset();
        
            // find coordinate system to use
            element = $(element);
            var delta = [0, 0];
            var parent = null;
            // delta [0,0] will do fine with position: fixed elements,
            // position:absolute needs offsetParent deltas
            if (Element.getStyle(element, 'position') == 'absolute') {
              parent = element.getOffsetParent();
              delta = parent.viewportOffset();
            }
        
            // correct by body offsets (fixes Safari)
            if (parent == document.body) {
              delta[0] -= document.body.offsetLeft;
              delta[1] -= document.body.offsetTop;
            }
        
            // set position
            if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
            if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
            if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
            if (options.setHeight) element.style.height = source.offsetHeight + 'px';
            return element;
          }
        };
        
        Element.Methods.identify.counter = 1;
        
        Object.extend(Element.Methods, {
          getElementsBySelector: Element.Methods.select,
          childElements: Element.Methods.immediateDescendants
        });
        
        Element._attributeTranslations = {
          write: {
            names: {
              className: 'class',
              htmlFor:   'for'
            },
            values: { }
          }
        };
        
        if (Prototype.Browser.Opera) {
          Element.Methods.getStyle = Element.Methods.getStyle.wrap(
            function(proceed, element, style) {
              switch (style) {
                case 'left': case 'top': case 'right': case 'bottom':
                  if (proceed(element, 'position') === 'static') return null;
                case 'height': case 'width':
                  // returns '0px' for hidden elements; we want it to return null
                  if (!Element.visible(element)) return null;
        
                  // returns the border-box dimensions rather than the content-box
                  // dimensions, so we subtract padding and borders from the value
                  var dim = parseInt(proceed(element, style), 10);
        
                  if (dim !== element['offset' + style.capitalize()])
                    return dim + 'px';
        
                  var properties;
                  if (style === 'height') {
                    properties = ['border-top-width', 'padding-top',
                     'padding-bottom', 'border-bottom-width'];
                  }
                  else {
                    properties = ['border-left-width', 'padding-left',
                     'padding-right', 'border-right-width'];
                  }
                  return properties.inject(dim, function(memo, property) {
                    var val = proceed(element, property);
                    return val === null ? memo : memo - parseInt(val, 10);
                  }) + 'px';
                default: return proceed(element, style);
              }
            }
          );
        
          Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
            function(proceed, element, attribute) {
              if (attribute === 'title') return element.title;
              return proceed(element, attribute);
            }
          );
        }
        
        else if (Prototype.Browser.IE) {
          // IE doesn't report offsets correctly for static elements, so we change them
          // to "relative" to get the values, then change them back.
          Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
            function(proceed, element) {
              element = $(element);
              // IE throws an error if element is not in document
              try { element.offsetParent }
              catch(e) { return $(document.body) }
              var position = element.getStyle('position');
              if (position !== 'static') return proceed(element);
              element.setStyle({ position: 'relative' });
              var value = proceed(element);
              element.setStyle({ position: position });
              return value;
            }
          );
        
          $w('positionedOffset viewportOffset').each(function(method) {
            Element.Methods[method] = Element.Methods[method].wrap(
              function(proceed, element) {
                element = $(element);
                try { element.offsetParent }
                catch(e) { return Element._returnOffset(0,0) }
                var position = element.getStyle('position');
                if (position !== 'static') return proceed(element);
                // Trigger hasLayout on the offset parent so that IE6 reports
                // accurate offsetTop and offsetLeft values for position: fixed.
                var offsetParent = element.getOffsetParent();
                if (offsetParent && offsetParent.getStyle('position') === 'fixed')
                  offsetParent.setStyle({ zoom: 1 });
                element.setStyle({ position: 'relative' });
                var value = proceed(element);
                element.setStyle({ position: position });
                return value;
              }
            );
          });
        
          Element.Methods.cumulativeOffset = Element.Methods.cumulativeOffset.wrap(
            function(proceed, element) {
              try { element.offsetParent }
              catch(e) { return Element._returnOffset(0,0) }
              return proceed(element);
            }
          );
        
          Element.Methods.getStyle = function(element, style) {
            element = $(element);
            style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
            var value = element.style[style];
            if (!value && element.currentStyle) value = element.currentStyle[style];
        
            if (style == 'opacity') {
              if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
                if (value[1]) return parseFloat(value[1]) / 100;
              return 1.0;
            }
        
            if (value == 'auto') {
              if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
                return element['offset' + style.capitalize()] + 'px';
              return null;
            }
            return value;
          };
        
          Element.Methods.setOpacity = function(element, value) {
            function stripAlpha(filter){
              return filter.replace(/alpha\([^\)]*\)/gi,'');
            }
            element = $(element);
            var currentStyle = element.currentStyle;
            if ((currentStyle && !currentStyle.hasLayout) ||
              (!currentStyle && element.style.zoom == 'normal'))
                element.style.zoom = 1;
        
            var filter = element.getStyle('filter'), style = element.style;
            if (value == 1 || value === '') {
              (filter = stripAlpha(filter)) ?
                style.filter = filter : style.removeAttribute('filter');
              return element;
            } else if (value < 0.00001) value = 0;
            style.filter = stripAlpha(filter) +
              'alpha(opacity=' + (value * 100) + ')';
            return element;
          };
        
          Element._attributeTranslations = {
            read: {
              names: {
                'class': 'className',
                'for':   'htmlFor'
              },
              values: {
                _getAttr: function(element, attribute) {
                  return element.getAttribute(attribute, 2);
                },
                _getAttrNode: function(element, attribute) {
                  var node = element.getAttributeNode(attribute);
                  return node ? node.value : "";
                },
                _getEv: function(element, attribute) {
                  attribute = element.getAttribute(attribute);
                  return attribute ? attribute.toString().slice(23, -2) : null;
                },
                _flag: function(element, attribute) {
                  return $(element).hasAttribute(attribute) ? attribute : null;
                },
                style: function(element) {
                  return element.style.cssText.toLowerCase();
                },
                title: function(element) {
                  return element.title;
                }
              }
            }
          };
        
          Element._attributeTranslations.write = {
            names: Object.extend({
              cellpadding: 'cellPadding',
              cellspacing: 'cellSpacing'
            }, Element._attributeTranslations.read.names),
            values: {
              checked: function(element, value) {
                element.checked = !!value;
              },
        
              style: function(element, value) {
                element.style.cssText = value ? value : '';
              }
            }
          };
        
          Element._attributeTranslations.has = {};
        
          $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
              'encType maxLength readOnly longDesc frameBorder').each(function(attr) {
            Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
            Element._attributeTranslations.has[attr.toLowerCase()] = attr;
          });
        
          (function(v) {
            Object.extend(v, {
              href:        v._getAttr,
              src:         v._getAttr,
              type:        v._getAttr,
              action:      v._getAttrNode,
              disabled:    v._flag,
              checked:     v._flag,
              readonly:    v._flag,
              multiple:    v._flag,
              onload:      v._getEv,
              onunload:    v._getEv,
              onclick:     v._getEv,
              ondblclick:  v._getEv,
              onmousedown: v._getEv,
              onmouseup:   v._getEv,
              onmouseover: v._getEv,
              onmousemove: v._getEv,
              onmouseout:  v._getEv,
              onfocus:     v._getEv,
              onblur:      v._getEv,
              onkeypress:  v._getEv,
              onkeydown:   v._getEv,
              onkeyup:     v._getEv,
              onsubmit:    v._getEv,
              onreset:     v._getEv,
              onselect:    v._getEv,
              onchange:    v._getEv
            });
          })(Element._attributeTranslations.read.values);
        }
        
        else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
          Element.Methods.setOpacity = function(element, value) {
            element = $(element);
            element.style.opacity = (value == 1) ? 0.999999 :
              (value === '') ? '' : (value < 0.00001) ? 0 : value;
            return element;
          };
        }
        
        else if (Prototype.Browser.WebKit) {
          Element.Methods.setOpacity = function(element, value) {
            element = $(element);
            element.style.opacity = (value == 1 || value === '') ? '' :
              (value < 0.00001) ? 0 : value;
        
            if (value == 1)
              if(element.tagName.toUpperCase() == 'IMG' && element.width) {
                element.width++; element.width--;
              } else try {
                var n = document.createTextNode(' ');
                element.appendChild(n);
                element.removeChild(n);
              } catch (e) { }
        
            return element;
          };
        
          // Safari returns margins on body which is incorrect if the child is absolutely
          // positioned.  For performance reasons, redefine Element#cumulativeOffset for
          // KHTML/WebKit only.
          Element.Methods.cumulativeOffset = function(element) {
            var valueT = 0, valueL = 0;
            do {
              valueT += element.offsetTop  || 0;
              valueL += element.offsetLeft || 0;
              if (element.offsetParent == document.body)
                if (Element.getStyle(element, 'position') == 'absolute') break;
        
              element = element.offsetParent;
            } while (element);
        
            return Element._returnOffset(valueL, valueT);
          };
        }
        
        if (Prototype.Browser.IE || Prototype.Browser.Opera) {
          // IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
          Element.Methods.update = function(element, content) {
            element = $(element);
        
            if (content && content.toElement) content = content.toElement();
            if (Object.isElement(content)) return element.update().insert(content);
        
            content = Object.toHTML(content);
            var tagName = element.tagName.toUpperCase();
        
            if (tagName in Element._insertionTranslations.tags) {
              $A(element.childNodes).each(function(node) { element.removeChild(node) });
              Element._getContentFromAnonymousElement(tagName, content.stripScripts())
                .each(function(node) { element.appendChild(node) });
            }
            else element.innerHTML = content.stripScripts();
        
            content.evalScripts.bind(content).defer();
            return element;
          };
        }
        
        if ('outerHTML' in document.createElement('div')) {
          Element.Methods.replace = function(element, content) {
            element = $(element);
        
            if (content && content.toElement) content = content.toElement();
            if (Object.isElement(content)) {
              element.parentNode.replaceChild(content, element);
              return element;
            }
        
            content = Object.toHTML(content);
            var parent = element.parentNode, tagName = parent.tagName.toUpperCase();
        
            if (Element._insertionTranslations.tags[tagName]) {
              var nextSibling = element.next();
              var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
              parent.removeChild(element);
              if (nextSibling)
                fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
              else
                fragments.each(function(node) { parent.appendChild(node) });
            }
            else element.outerHTML = content.stripScripts();
        
            content.evalScripts.bind(content).defer();
            return element;
          };
        }
        
        Element._returnOffset = function(l, t) {
          var result = [l, t];
          result.left = l;
          result.top = t;
          return result;
        };
        
        Element._getContentFromAnonymousElement = function(tagName, html) {
          var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
          if (t) {
            div.innerHTML = t[0] + html + t[1];
            t[2].times(function() { div = div.firstChild });
          } else div.innerHTML = html;
          return $A(div.childNodes);
        };
        
        Element._insertionTranslations = {
          before: function(element, node) {
            element.parentNode.insertBefore(node, element);
          },
          top: function(element, node) {
            element.insertBefore(node, element.firstChild);
          },
          bottom: function(element, node) {
            element.appendChild(node);
          },
          after: function(element, node) {
            element.parentNode.insertBefore(node, element.nextSibling);
          },
          tags: {
            TABLE:  ['<table>',                '</table>',                   1],
            TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
            TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
            TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
            SELECT: ['<select>',               '</select>',                  1]
          }
        };
        
        (function() {
          Object.extend(this.tags, {
            THEAD: this.tags.TBODY,
            TFOOT: this.tags.TBODY,
            TH:    this.tags.TD
          });
        }).call(Element._insertionTranslations);
        
        Element.Methods.Simulated = {
          hasAttribute: function(element, attribute) {
            attribute = Element._attributeTranslations.has[attribute] || attribute;
            var node = $(element).getAttributeNode(attribute);
            return !!(node && node.specified);
          }
        };
        
        Element.Methods.ByTag = { };
        
        Object.extend(Element, Element.Methods);
        
        if (!Prototype.BrowserFeatures.ElementExtensions &&
            document.createElement('div')['__proto__']) {
          window.HTMLElement = { };
          window.HTMLElement.prototype = document.createElement('div')['__proto__'];
          Prototype.BrowserFeatures.ElementExtensions = true;
        }
        
        Element.extend = (function() {
          if (Prototype.BrowserFeatures.SpecificElementExtensions)
            return Prototype.K;
        
          var Methods = { }, ByTag = Element.Methods.ByTag;
        
          var extend = Object.extend(function(element) {
            if (!element || element._extendedByPrototype ||
                element.nodeType != 1 || element == window) return element;
        
            var methods = Object.clone(Methods),
              tagName = element.tagName.toUpperCase(), property, value;
        
            // extend methods for specific tags
            if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);
        
            for (property in methods) {
              value = methods[property];
              if (Object.isFunction(value) && !(property in element))
                element[property] = value.methodize();
            }
        
            element._extendedByPrototype = Prototype.emptyFunction;
            return element;
        
          }, {
            refresh: function() {
              // extend methods for all tags (Safari doesn't need this)
              if (!Prototype.BrowserFeatures.ElementExtensions) {
                Object.extend(Methods, Element.Methods);
                Object.extend(Methods, Element.Methods.Simulated);
              }
            }
          });
        
          extend.refresh();
          return extend;
        })();
        
        Element.hasAttribute = function(element, attribute) {
          if (element.hasAttribute) return element.hasAttribute(attribute);
          return Element.Methods.Simulated.hasAttribute(element, attribute);
        };
        
        Element.addMethods = function(methods) {
          var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;
        
          if (!methods) {
            Object.extend(Form, Form.Methods);
            Object.extend(Form.Element, Form.Element.Methods);
            Object.extend(Element.Methods.ByTag, {
              "FORM":     Object.clone(Form.Methods),
              "INPUT":    Object.clone(Form.Element.Methods),
              "SELECT":   Object.clone(Form.Element.Methods),
              "TEXTAREA": Object.clone(Form.Element.Methods)
            });
          }
        
          if (arguments.length == 2) {
            var tagName = methods;
            methods = arguments[1];
          }
        
          if (!tagName) Object.extend(Element.Methods, methods || { });
          else {
            if (Object.isArray(tagName)) tagName.each(extend);
            else extend(tagName);
          }
        
          function extend(tagName) {
            tagName = tagName.toUpperCase();
            if (!Element.Methods.ByTag[tagName])
              Element.Methods.ByTag[tagName] = { };
            Object.extend(Element.Methods.ByTag[tagName], methods);
          }
        
          function copy(methods, destination, onlyIfAbsent) {
            onlyIfAbsent = onlyIfAbsent || false;
            for (var property in methods) {
              var value = methods[property];
              if (!Object.isFunction(value)) continue;
              if (!onlyIfAbsent || !(property in destination))
                destination[property] = value.methodize();
            }
          }
        
          function findDOMClass(tagName) {
            var klass;
            var trans = {
              "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
              "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
              "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
              "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
              "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
              "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
              "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
              "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
              "FrameSet", "IFRAME": "IFrame"
            };
            if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
            if (window[klass]) return window[klass];
            klass = 'HTML' + tagName + 'Element';
            if (window[klass]) return window[klass];
            klass = 'HTML' + tagName.capitalize() + 'Element';
            if (window[klass]) return window[klass];
        
            window[klass] = { };
            window[klass].prototype = document.createElement(tagName)['__proto__'];
            return window[klass];
          }
        
          if (F.ElementExtensions) {
            copy(Element.Methods, HTMLElement.prototype);
            copy(Element.Methods.Simulated, HTMLElement.prototype, true);
          }
        
          if (F.SpecificElementExtensions) {
            for (var tag in Element.Methods.ByTag) {
              var klass = findDOMClass(tag);
              if (Object.isUndefined(klass)) continue;
              copy(T[tag], klass.prototype);
            }
          }
        
          Object.extend(Element, Element.Methods);
          delete Element.ByTag;
        
          if (Element.extend.refresh) Element.extend.refresh();
          Element.cache = { };
        };
        
        document.viewport = {
          getDimensions: function() {
            var dimensions = { }, B = Prototype.Browser;
            $w('width height').each(function(d) {
              var D = d.capitalize();
              if (B.WebKit && !document.evaluate) {
                // Safari <3.0 needs self.innerWidth/Height
                dimensions[d] = self['inner' + D];
              } else if (B.Opera && parseFloat(window.opera.version()) < 9.5) {
                // Opera <9.5 needs document.body.clientWidth/Height
                dimensions[d] = document.body['client' + D]
              } else {
                dimensions[d] = document.documentElement['client' + D];
              }
            });
            return dimensions;
          },
        
          getWidth: function() {
            return this.getDimensions().width;
          },
        
          getHeight: function() {
            return this.getDimensions().height;
          },
        
          getScrollOffsets: function() {
            return Element._returnOffset(
              window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
              window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
          }
        };
        /* Portions of the Selector class are derived from Jack Slocum's DomQuery,
         * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
         * license.  Please see http://www.yui-ext.com/ for more information. */
        
        var Selector = Class.create({
          initialize: function(expression) {
            this.expression = expression.strip();
        
            if (this.shouldUseSelectorsAPI()) {
              this.mode = 'selectorsAPI';
            } else if (this.shouldUseXPath()) {
              this.mode = 'xpath';
              this.compileXPathMatcher();
            } else {
              this.mode = "normal";
              this.compileMatcher();
            }
        
          },
        
          shouldUseXPath: function() {
            if (!Prototype.BrowserFeatures.XPath) return false;
        
            var e = this.expression;
        
            // Safari 3 chokes on :*-of-type and :empty
            if (Prototype.Browser.WebKit &&
             (e.include("-of-type") || e.include(":empty")))
              return false;
        
            // XPath can't do namespaced attributes, nor can it read
            // the "checked" property from DOM nodes
            if ((/(\[[\w-]*?:|:checked)/).test(e))
              return false;
        
            return true;
          },
        
          shouldUseSelectorsAPI: function() {
            if (!Prototype.BrowserFeatures.SelectorsAPI) return false;
        
            if (!Selector._div) Selector._div = new Element('div');
        
            // Make sure the browser treats the selector as valid. Test on an
            // isolated element to minimize cost of this check.
            try {
              Selector._div.querySelector(this.expression);
            } catch(e) {
              return false;
            }
        
            return true;
          },
        
          compileMatcher: function() {
            var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
                c = Selector.criteria, le, p, m;
        
            if (Selector._cache[e]) {
              this.matcher = Selector._cache[e];
              return;
            }
        
            this.matcher = ["this.matcher = function(root) {",
                            "var r = root, h = Selector.handlers, c = false, n;"];
        
            while (e && le != e && (/\S/).test(e)) {
              le = e;
              for (var i in ps) {
                p = ps[i];
                if (m = e.match(p)) {
                  this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
                    new Template(c[i]).evaluate(m));
                  e = e.replace(m[0], '');
                  break;
                }
              }
            }
        
            this.matcher.push("return h.unique(n);\n}");
            eval(this.matcher.join('\n'));
            Selector._cache[this.expression] = this.matcher;
          },
        
          compileXPathMatcher: function() {
            var e = this.expression, ps = Selector.patterns,
                x = Selector.xpath, le, m;
        
            if (Selector._cache[e]) {
              this.xpath = Selector._cache[e]; return;
            }
        
            this.matcher = ['.//*'];
            while (e && le != e && (/\S/).test(e)) {
              le = e;
              for (var i in ps) {
                if (m = e.match(ps[i])) {
                  this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
                    new Template(x[i]).evaluate(m));
                  e = e.replace(m[0], '');
                  break;
                }
              }
            }
        
            this.xpath = this.matcher.join('');
            Selector._cache[this.expression] = this.xpath;
          },
        
          findElements: function(root) {
            root = root || document;
            var e = this.expression, results;
        
            switch (this.mode) {
              case 'selectorsAPI':
                // querySelectorAll queries document-wide, then filters to descendants
                // of the context element. That's not what we want.
                // Add an explicit context to the selector if necessary.
                if (root !== document) {
                  var oldId = root.id, id = $(root).identify();
                  e = "#" + id + " " + e;
                }
        
                results = $A(root.querySelectorAll(e)).map(Element.extend);
                root.id = oldId;
        
                return results;
              case 'xpath':
                return document._getElementsByXPath(this.xpath, root);
              default:
               return this.matcher(root);
            }
          },
        
          match: function(element) {
            this.tokens = [];
        
            var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
            var le, p, m;
        
            while (e && le !== e && (/\S/).test(e)) {
              le = e;
              for (var i in ps) {
                p = ps[i];
                if (m = e.match(p)) {
                  // use the Selector.assertions methods unless the selector
                  // is too complex.
                  if (as[i]) {
                    this.tokens.push([i, Object.clone(m)]);
                    e = e.replace(m[0], '');
                  } else {
                    // reluctantly do a document-wide search
                    // and look for a match in the array
                    return this.findElements(document).include(element);
                  }
                }
              }
            }
        
            var match = true, name, matches;
            for (var i = 0, token; token = this.tokens[i]; i++) {
              name = token[0], matches = token[1];
              if (!Selector.assertions[name](element, matches)) {
                match = false; break;
              }
            }
        
            return match;
          },
        
          toString: function() {
            return this.expression;
          },
        
          inspect: function() {
            return "#<Selector:" + this.expression.inspect() + ">";
          }
        });
        
        Object.extend(Selector, {
          _cache: { },
        
          xpath: {
            descendant:   "//*",
            child:        "/*",
            adjacent:     "/following-sibling::*[1]",
            laterSibling: '/following-sibling::*',
            tagName:      function(m) {
              if (m[1] == '*') return '';
              return "[local-name()='" + m[1].toLowerCase() +
                     "' or local-name()='" + m[1].toUpperCase() + "']";
            },
            className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
            id:           "[@id='#{1}']",
            attrPresence: function(m) {
              m[1] = m[1].toLowerCase();
              return new Template("[@#{1}]").evaluate(m);
            },
            attr: function(m) {
              m[1] = m[1].toLowerCase();
              m[3] = m[5] || m[6];
              return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
            },
            pseudo: function(m) {
              var h = Selector.xpath.pseudos[m[1]];
              if (!h) return '';
              if (Object.isFunction(h)) return h(m);
              return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
            },
            operators: {
              '=':  "[@#{1}='#{3}']",
              '!=': "[@#{1}!='#{3}']",
              '^=': "[starts-with(@#{1}, '#{3}')]",
              '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
              '*=': "[contains(@#{1}, '#{3}')]",
              '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
              '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
            },
            pseudos: {
              'first-child': '[not(preceding-sibling::*)]',
              'last-child':  '[not(following-sibling::*)]',
              'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
              'empty':       "[count(*) = 0 and (count(text()) = 0)]",
              'checked':     "[@checked]",
              'disabled':    "[(@disabled) and (@type!='hidden')]",
              'enabled':     "[not(@disabled) and (@type!='hidden')]",
              'not': function(m) {
                var e = m[6], p = Selector.patterns,
                    x = Selector.xpath, le, v;
        
                var exclusion = [];
                while (e && le != e && (/\S/).test(e)) {
                  le = e;
                  for (var i in p) {
                    if (m = e.match(p[i])) {
                      v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m);
                      exclusion.push("(" + v.substring(1, v.length - 1) + ")");
                      e = e.replace(m[0], '');
                      break;
                    }
                  }
                }
                return "[not(" + exclusion.join(" and ") + ")]";
              },
              'nth-child':      function(m) {
                return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
              },
              'nth-last-child': function(m) {
                return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
              },
              'nth-of-type':    function(m) {
                return Selector.xpath.pseudos.nth("position() ", m);
              },
              'nth-last-of-type': function(m) {
                return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
              },
              'first-of-type':  function(m) {
                m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
              },
              'last-of-type':   function(m) {
                m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
              },
              'only-of-type':   function(m) {
                var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
              },
              nth: function(fragment, m) {
                var mm, formula = m[6], predicate;
                if (formula == 'even') formula = '2n+0';
                if (formula == 'odd')  formula = '2n+1';
                if (mm = formula.match(/^(\d+)$/)) // digit only
                  return '[' + fragment + "= " + mm[1] + ']';
                if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
                  if (mm[1] == "-") mm[1] = -1;
                  var a = mm[1] ? Number(mm[1]) : 1;
                  var b = mm[2] ? Number(mm[2]) : 0;
                  predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
                  "((#{fragment} - #{b}) div #{a} >= 0)]";
                  return new Template(predicate).evaluate({
                    fragment: fragment, a: a, b: b });
                }
              }
            }
          },
        
          criteria: {
            tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
            className:    'n = h.className(n, r, "#{1}", c);    c = false;',
            id:           'n = h.id(n, r, "#{1}", c);           c = false;',
            attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
            attr: function(m) {
              m[3] = (m[5] || m[6]);
              return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
            },
            pseudo: function(m) {
              if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
              return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
            },
            descendant:   'c = "descendant";',
            child:        'c = "child";',
            adjacent:     'c = "adjacent";',
            laterSibling: 'c = "laterSibling";'
          },
        
          patterns: {
            // combinators must be listed first
            // (and descendant needs to be last combinator)
            laterSibling: /^\s*~\s*/,
            child:        /^\s*>\s*/,
            adjacent:     /^\s*\+\s*/,
            descendant:   /^\s/,
        
            // selectors follow
            tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
            id:           /^#([\w\-\*]+)(\b|$)/,
            className:    /^\.([\w\-\*]+)(\b|$)/,
            pseudo:
        /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
            attrPresence: /^\[((?:[\w]+:)?[\w]+)\]/,
            attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
          },
        
          // for Selector.match and Element#match
          assertions: {
            tagName: function(element, matches) {
              return matches[1].toUpperCase() == element.tagName.toUpperCase();
            },
        
            className: function(element, matches) {
              return Element.hasClassName(element, matches[1]);
            },
        
            id: function(element, matches) {
              return element.id === matches[1];
            },
        
            attrPresence: function(element, matches) {
              return Element.hasAttribute(element, matches[1]);
            },
        
            attr: function(element, matches) {
              var nodeValue = Element.readAttribute(element, matches[1]);
              return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
            }
          },
        
          handlers: {
            // UTILITY FUNCTIONS
            // joins two collections
            concat: function(a, b) {
              for (var i = 0, node; node = b[i]; i++)
                a.push(node);
              return a;
            },
        
            // marks an array of nodes for counting
            mark: function(nodes) {
              var _true = Prototype.emptyFunction;
              for (var i = 0, node; node = nodes[i]; i++)
                node._countedByPrototype = _true;
              return nodes;
            },
        
            unmark: function(nodes) {
              for (var i = 0, node; node = nodes[i]; i++)
                node._countedByPrototype = undefined;
              return nodes;
            },
        
            // mark each child node with its position (for nth calls)
            // "ofType" flag indicates whether we're indexing for nth-of-type
            // rather than nth-child
            index: function(parentNode, reverse, ofType) {
              parentNode._countedByPrototype = Prototype.emptyFunction;
              if (reverse) {
                for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
                  var node = nodes[i];
                  if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
                }
              } else {
                for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
                  if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
              }
            },
        
            // filters out duplicates and extends all nodes
            unique: function(nodes) {
              if (nodes.length == 0) return nodes;
              var results = [], n;
              for (var i = 0, l = nodes.length; i < l; i++)
                if (!(n = nodes[i])._countedByPrototype) {
                  n._countedByPrototype = Prototype.emptyFunction;
                  results.push(Element.extend(n));
                }
              return Selector.handlers.unmark(results);
            },
        
            // COMBINATOR FUNCTIONS
            descendant: function(nodes) {
              var h = Selector.handlers;
              for (var i = 0, results = [], node; node = nodes[i]; i++)
                h.concat(results, node.getElementsByTagName('*'));
              return results;
            },
        
            child: function(nodes) {
              var h = Selector.handlers;
              for (var i = 0, results = [], node; node = nodes[i]; i++) {
                for (var j = 0, child; child = node.childNodes[j]; j++)
                  if (child.nodeType == 1 && child.tagName != '!') results.push(child);
              }
              return results;
            },
        
            adjacent: function(nodes) {
              for (var i = 0, results = [], node; node = nodes[i]; i++) {
                var next = this.nextElementSibling(node);
                if (next) results.push(next);
              }
              return results;
            },
        
            laterSibling: function(nodes) {
              var h = Selector.handlers;
              for (var i = 0, results = [], node; node = nodes[i]; i++)
                h.concat(results, Element.nextSiblings(node));
              return results;
            },
        
            nextElementSibling: function(node) {
              while (node = node.nextSibling)
                if (node.nodeType == 1) return node;
              return null;
            },
        
            previousElementSibling: function(node) {
              while (node = node.previousSibling)
                if (node.nodeType == 1) return node;
              return null;
            },
        
            // TOKEN FUNCTIONS
            tagName: function(nodes, root, tagName, combinator) {
              var uTagName = tagName.toUpperCase();
              var results = [], h = Selector.handlers;
              if (nodes) {
                if (combinator) {
                  // fastlane for ordinary descendant combinators
                  if (combinator == "descendant") {
                    for (var i = 0, node; node = nodes[i]; i++)
                      h.concat(results, node.getElementsByTagName(tagName));
                    return results;
                  } else nodes = this[combinator](nodes);
                  if (tagName == "*") return nodes;
                }
                for (var i = 0, node; node = nodes[i]; i++)
                  if (node.tagName.toUpperCase() === uTagName) results.push(node);
                return results;
              } else return root.getElementsByTagName(tagName);
            },
        
            id: function(nodes, root, id, combinator) {
              var targetNode = $(id), h = Selector.handlers;
              if (!targetNode) return [];
              if (!nodes && root == document) return [targetNode];
              if (nodes) {
                if (combinator) {
                  if (combinator == 'child') {
                    for (var i = 0, node; node = nodes[i]; i++)
                      if (targetNode.parentNode == node) return [targetNode];
                  } else if (combinator == 'descendant') {
                    for (var i = 0, node; node = nodes[i]; i++)
                      if (Element.descendantOf(targetNode, node)) return [targetNode];
                  } else if (combinator == 'adjacent') {
                    for (var i = 0, node; node = nodes[i]; i++)
                      if (Selector.handlers.previousElementSibling(targetNode) == node)
                        return [targetNode];
                  } else nodes = h[combinator](nodes);
                }
                for (var i = 0, node; node = nodes[i]; i++)
                  if (node == targetNode) return [targetNode];
                return [];
              }
              return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
            },
        
            className: function(nodes, root, className, combinator) {
              if (nodes && combinator) nodes = this[combinator](nodes);
              return Selector.handlers.byClassName(nodes, root, className);
            },
        
            byClassName: function(nodes, root, className) {
              if (!nodes) nodes = Selector.handlers.descendant([root]);
              var needle = ' ' + className + ' ';
              for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
                nodeClassName = node.className;
                if (nodeClassName.length == 0) continue;
                if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
                  results.push(node);
              }
              return results;
            },
        
            attrPresence: function(nodes, root, attr, combinator) {
              if (!nodes) nodes = root.getElementsByTagName("*");
              if (nodes && combinator) nodes = this[combinator](nodes);
              var results = [];
              for (var i = 0, node; node = nodes[i]; i++)
                if (Element.hasAttribute(node, attr)) results.push(node);
              return results;
            },
        
            attr: function(nodes, root, attr, value, operator, combinator) {
              if (!nodes) nodes = root.getElementsByTagName("*");
              if (nodes && combinator) nodes = this[combinator](nodes);
              var handler = Selector.operators[operator], results = [];
              for (var i = 0, node; node = nodes[i]; i++) {
                var nodeValue = Element.readAttribute(node, attr);
                if (nodeValue === null) continue;
                if (handler(nodeValue, value)) results.push(node);
              }
              return results;
            },
        
            pseudo: function(nodes, name, value, root, combinator) {
              if (nodes && combinator) nodes = this[combinator](nodes);
              if (!nodes) nodes = root.getElementsByTagName("*");
              return Selector.pseudos[name](nodes, value, root);
            }
          },
        
          pseudos: {
            'first-child': function(nodes, value, root) {
              for (var i = 0, results = [], node; node = nodes[i]; i++) {
                if (Selector.handlers.previousElementSibling(node)) continue;
                  results.push(node);
              }
              return results;
            },
            'last-child': function(nodes, value, root) {
              for (var i = 0, results = [], node; node = nodes[i]; i++) {
                if (Selector.handlers.nextElementSibling(node)) continue;
                  results.push(node);
              }
              return results;
            },
            'only-child': function(nodes, value, root) {
              var h = Selector.handlers;
              for (var i = 0, results = [], node; node = nodes[i]; i++)
                if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
                  results.push(node);
              return results;
            },
            'nth-child':        function(nodes, formula, root) {
              return Selector.pseudos.nth(nodes, formula, root);
            },
            'nth-last-child':   function(nodes, formula, root) {
              return Selector.pseudos.nth(nodes, formula, root, true);
            },
            'nth-of-type':      function(nodes, formula, root) {
              return Selector.pseudos.nth(nodes, formula, root, false, true);
            },
            'nth-last-of-type': function(nodes, formula, root) {
              return Selector.pseudos.nth(nodes, formula, root, true, true);
            },
            'first-of-type':    function(nodes, formula, root) {
              return Selector.pseudos.nth(nodes, "1", root, false, true);
            },
            'last-of-type':     function(nodes, formula, root) {
              return Selector.pseudos.nth(nodes, "1", root, true, true);
            },
            'only-of-type':     function(nodes, formula, root) {
              var p = Selector.pseudos;
              return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
            },
        
            // handles the an+b logic
            getIndices: function(a, b, total) {
              if (a == 0) return b > 0 ? [b] : [];
              return $R(1, total).inject([], function(memo, i) {
                if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
                return memo;
              });
            },
        
            // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
            nth: function(nodes, formula, root, reverse, ofType) {
              if (nodes.length == 0) return [];
              if (formula == 'even') formula = '2n+0';
              if (formula == 'odd')  formula = '2n+1';
              var h = Selector.handlers, results = [], indexed = [], m;
              h.mark(nodes);
              for (var i = 0, node; node = nodes[i]; i++) {
                if (!node.parentNode._countedByPrototype) {
                  h.index(node.parentNode, reverse, ofType);
                  indexed.push(node.parentNode);
                }
              }
              if (formula.match(/^\d+$/)) { // just a number
                formula = Number(formula);
                for (var i = 0, node; node = nodes[i]; i++)
                  if (node.nodeIndex == formula) results.push(node);
              } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
                if (m[1] == "-") m[1] = -1;
                var a = m[1] ? Number(m[1]) : 1;
                var b = m[2] ? Number(m[2]) : 0;
                var indices = Selector.pseudos.getIndices(a, b, nodes.length);
                for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
                  for (var j = 0; j < l; j++)
                    if (node.nodeIndex == indices[j]) results.push(node);
                }
              }
              h.unmark(nodes);
              h.unmark(indexed);
              return results;
            },
        
            'empty': function(nodes, value, root) {
              for (var i = 0, results = [], node; node = nodes[i]; i++) {
                // IE treats comments as element nodes
                if (node.tagName == '!' || node.firstChild) continue;
                results.push(node);
              }
              return results;
            },
        
            'not': function(nodes, selector, root) {
              var h = Selector.handlers, selectorType, m;
              var exclusions = new Selector(selector).findElements(root);
              h.mark(exclusions);
              for (var i = 0, results = [], node; node = nodes[i]; i++)
                if (!node._countedByPrototype) results.push(node);
              h.unmark(exclusions);
              return results;
            },
        
            'enabled': function(nodes, value, root) {
              for (var i = 0, results = [], node; node = nodes[i]; i++)
                if (!node.disabled && (!node.type || node.type !== 'hidden'))
                  results.push(node);
              return results;
            },
        
            'disabled': function(nodes, value, root) {
              for (var i = 0, results = [], node; node = nodes[i]; i++)
                if (node.disabled) results.push(node);
              return results;
            },
        
            'checked': function(nodes, value, root) {
              for (var i = 0, results = [], node; node = nodes[i]; i++)
                if (node.checked) results.push(node);
              return results;
            }
          },
        
          operators: {
            '=':  function(nv, v) { return nv == v; },
            '!=': function(nv, v) { return nv != v; },
            '^=': function(nv, v) { return nv == v || nv && nv.startsWith(v); },
            '$=': function(nv, v) { return nv == v || nv && nv.endsWith(v); },
            '*=': function(nv, v) { return nv == v || nv && nv.include(v); },
            '$=': function(nv, v) { return nv.endsWith(v); },
            '*=': function(nv, v) { return nv.include(v); },
            '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
            '|=': function(nv, v) { return ('-' + (nv || "").toUpperCase() +
             '-').include('-' + (v || "").toUpperCase() + '-'); }
          },
        
          split: function(expression) {
            var expressions = [];
            expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
              expressions.push(m[1].strip());
            });
            return expressions;
          },
        
          matchElements: function(elements, expression) {
            var matches = $$(expression), h = Selector.handlers;
            h.mark(matches);
            for (var i = 0, results = [], element; element = elements[i]; i++)
              if (element._countedByPrototype) results.push(element);
            h.unmark(matches);
            return results;
          },
        
          findElement: function(elements, expression, index) {
            if (Object.isNumber(expression)) {
              index = expression; expression = false;
            }
            return Selector.matchElements(elements, expression || '*')[index || 0];
          },
        
          findChildElements: function(element, expressions) {
            expressions = Selector.split(expressions.join(','));
            var results = [], h = Selector.handlers;
            for (var i = 0, l = expressions.length, selector; i < l; i++) {
              selector = new Selector(expressions[i].strip());
              h.concat(results, selector.findElements(element));
            }
            return (l > 1) ? h.unique(results) : results;
          }
        });
        
        if (Prototype.Browser.IE) {
          Object.extend(Selector.handlers, {
            // IE returns comment nodes on getElementsByTagName("*").
            // Filter them out.
            concat: function(a, b) {
              for (var i = 0, node; node = b[i]; i++)
                if (node.tagName !== "!") a.push(node);
              return a;
            },
        
            // IE improperly serializes _countedByPrototype in (inner|outer)HTML.
            unmark: function(nodes) {
              for (var i = 0, node; node = nodes[i]; i++)
                node.removeAttribute('_countedByPrototype');
              return nodes;
            }
          });
        }
        
        function $$() {
          return Selector.findChildElements(document, $A(arguments));
        }
        var Form = {
          reset: function(form) {
            $(form).reset();
            return form;
          },
        
          serializeElements: function(elements, options) {
            if (typeof options != 'object') options = { hash: !!options };
            else if (Object.isUndefined(options.hash)) options.hash = true;
            var key, value, submitted = false, submit = options.submit;
        
            var data = elements.inject({ }, function(result, element) {
              if (!element.disabled && element.name) {
                key = element.name; value = $(element).getValue();
                if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&
                    submit !== false && (!submit || key == submit) && (submitted = true)))) {
                  if (key in result) {
                    // a key is already present; construct an array of values
                    if (!Object.isArray(result[key])) result[key] = [result[key]];
                    result[key].push(value);
                  }
                  else result[key] = value;
                }
              }
              return result;
            });
        
            return options.hash ? data : Object.toQueryString(data);
          }
        };
        
        Form.Methods = {
          serialize: function(form, options) {
            return Form.serializeElements(Form.getElements(form), options);
          },
        
          getElements: function(form) {
            return $A($(form).getElementsByTagName('*')).inject([],
              function(elements, child) {
                if (Form.Element.Serializers[child.tagName.toLowerCase()])
                  elements.push(Element.extend(child));
                return elements;
              }
            );
          },
        
          getInputs: function(form, typeName, name) {
            form = $(form);
            var inputs = form.getElementsByTagName('input');
        
            if (!typeName && !name) return $A(inputs).map(Element.extend);
        
            for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
              var input = inputs[i];
              if ((typeName && input.type != typeName) || (name && input.name != name))
                continue;
              matchingInputs.push(Element.extend(input));
            }
        
            return matchingInputs;
          },
        
          disable: function(form) {
            form = $(form);
            Form.getElements(form).invoke('disable');
            return form;
          },
        
          enable: function(form) {
            form = $(form);
            Form.getElements(form).invoke('enable');
            return form;
          },
        
          findFirstElement: function(form) {
            var elements = $(form).getElements().findAll(function(element) {
              return 'hidden' != element.type && !element.disabled;
            });
            var firstByIndex = elements.findAll(function(element) {
              return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
            }).sortBy(function(element) { return element.tabIndex }).first();
        
            return firstByIndex ? firstByIndex : elements.find(function(element) {
              return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
            });
          },
        
          focusFirstElement: function(form) {
            form = $(form);
            form.findFirstElement().activate();
            return form;
          },
        
          request: function(form, options) {
            form = $(form), options = Object.clone(options || { });
        
            var params = options.parameters, action = form.readAttribute('action') || '';
            if (action.blank()) action = window.location.href;
            options.parameters = form.serialize(true);
        
            if (params) {
              if (Object.isString(params)) params = params.toQueryParams();
              Object.extend(options.parameters, params);
            }
        
            if (form.hasAttribute('method') && !options.method)
              options.method = form.method;
        
            return new Ajax.Request(action, options);
          }
        };
        
        /*--------------------------------------------------------------------------*/
        
        Form.Element = {
          focus: function(element) {
            $(element).focus();
            return element;
          },
        
          select: function(element) {
            $(element).select();
            return element;
          }
        };
        
        Form.Element.Methods = {
          serialize: function(element) {
            element = $(element);
            if (!element.disabled && element.name) {
              var value = element.getValue();
              if (value != undefined) {
                var pair = { };
                pair[element.name] = value;
                return Object.toQueryString(pair);
              }
            }
            return '';
          },
        
          getValue: function(element) {
            element = $(element);
            var method = element.tagName.toLowerCase();
            return Form.Element.Serializers[method](element);
          },
        
          setValue: function(element, value) {
            element = $(element);
            var method = element.tagName.toLowerCase();
            Form.Element.Serializers[method](element, value);
            return element;
          },
        
          clear: function(element) {
            $(element).value = '';
            return element;
          },
        
          present: function(element) {
            return $(element).value != '';
          },
        
          activate: function(element) {
            element = $(element);
            try {
              element.focus();
              if (element.select && (element.tagName.toLowerCase() != 'input' ||
                  !['button', 'reset', 'submit'].include(element.type)))
                element.select();
            } catch (e) { }
            return element;
          },
        
          disable: function(element) {
            element = $(element);
            element.disabled = true;
            return element;
          },
        
          enable: function(element) {
            element = $(element);
            element.disabled = false;
            return element;
          }
        };
        
        /*--------------------------------------------------------------------------*/
        
        var Field = Form.Element;
        var $F = Form.Element.Methods.getValue;
        
        /*--------------------------------------------------------------------------*/
        
        Form.Element.Serializers = {
          input: function(element, value) {
            switch (element.type.toLowerCase()) {
              case 'checkbox':
              case 'radio':
                return Form.Element.Serializers.inputSelector(element, value);
              default:
                return Form.Element.Serializers.textarea(element, value);
            }
          },
        
          inputSelector: function(element, value) {
            if (Object.isUndefined(value)) return element.checked ? element.value : null;
            else element.checked = !!value;
          },
        
          textarea: function(element, value) {
            if (Object.isUndefined(value)) return element.value;
            else element.value = value;
          },
        
          select: function(element, value) {
            if (Object.isUndefined(value))
              return this[element.type == 'select-one' ?
                'selectOne' : 'selectMany'](element);
            else {
              var opt, currentValue, single = !Object.isArray(value);
              for (var i = 0, length = element.length; i < length; i++) {
                opt = element.options[i];
                currentValue = this.optionValue(opt);
                if (single) {
                  if (currentValue == value) {
                    opt.selected = true;
                    return;
                  }
                }
                else opt.selected = value.include(currentValue);
              }
            }
          },
        
          selectOne: function(element) {
            var index = element.selectedIndex;
            return index >= 0 ? this.optionValue(element.options[index]) : null;
          },
        
          selectMany: function(element) {
            var values, length = element.length;
            if (!length) return null;
        
            for (var i = 0, values = []; i < length; i++) {
              var opt = element.options[i];
              if (opt.selected) values.push(this.optionValue(opt));
            }
            return values;
          },
        
          optionValue: function(opt) {
            // extend element because hasAttribute may not be native
            return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
          }
        };
        
        /*--------------------------------------------------------------------------*/
        
        Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
          initialize: function($super, element, frequency, callback) {
            $super(callback, frequency);
            this.element   = $(element);
            this.lastValue = this.getValue();
          },
        
          execute: function() {
            var value = this.getValue();
            if (Object.isString(this.lastValue) && Object.isString(value) ?
                this.lastValue != value : String(this.lastValue) != String(value)) {
              this.callback(this.element, value);
              this.lastValue = value;
            }
          }
        });
        
        Form.Element.Observer = Class.create(Abstract.TimedObserver, {
          getValue: function() {
            return Form.Element.getValue(this.element);
          }
        });
        
        Form.Observer = Class.create(Abstract.TimedObserver, {
          getValue: function() {
            return Form.serialize(this.element);
          }
        });
        
        /*--------------------------------------------------------------------------*/
        
        Abstract.EventObserver = Class.create({
          initialize: function(element, callback) {
            this.element  = $(element);
            this.callback = callback;
        
            this.lastValue = this.getValue();
            if (this.element.tagName.toLowerCase() == 'form')
              this.registerFormCallbacks();
            else
              this.registerCallback(this.element);
          },
        
          onElementEvent: function() {
            var value = this.getValue();
            if (this.lastValue != value) {
              this.callback(this.element, value);
              this.lastValue = value;
            }
          },
        
          registerFormCallbacks: function() {
            Form.getElements(this.element).each(this.registerCallback, this);
          },
        
          registerCallback: function(element) {
            if (element.type) {
              switch (element.type.toLowerCase()) {
                case 'checkbox':
                case 'radio':
                  Event.observe(element, 'click', this.onElementEvent.bind(this));
                  break;
                default:
                  Event.observe(element, 'change', this.onElementEvent.bind(this));
                  break;
              }
            }
          }
        });
        
        Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
          getValue: function() {
            return Form.Element.getValue(this.element);
          }
        });
        
        Form.EventObserver = Class.create(Abstract.EventObserver, {
          getValue: function() {
            return Form.serialize(this.element);
          }
        });
        if (!window.Event) var Event = { };
        
        Object.extend(Event, {
          KEY_BACKSPACE: 8,
          KEY_TAB:       9,
          KEY_RETURN:   13,
          KEY_ESC:      27,
          KEY_LEFT:     37,
          KEY_UP:       38,
          KEY_RIGHT:    39,
          KEY_DOWN:     40,
          KEY_DELETE:   46,
          KEY_HOME:     36,
          KEY_END:      35,
          KEY_PAGEUP:   33,
          KEY_PAGEDOWN: 34,
          KEY_INSERT:   45,
        
          cache: { },
        
          relatedTarget: function(event) {
            var element;
            switch(event.type) {
              case 'mouseover': element = event.fromElement; break;
              case 'mouseout':  element = event.toElement;   break;
              default: return null;
            }
            return Element.extend(element);
          }
        });
        
        Event.Methods = (function() {
          var isButton;
        
          if (Prototype.Browser.IE) {
            var buttonMap = { 0: 1, 1: 4, 2: 2 };
            isButton = function(event, code) {
              return event.button == buttonMap[code];
            };
        
          } else if (Prototype.Browser.WebKit) {
            isButton = function(event, code) {
              switch (code) {
                case 0: return event.which == 1 && !event.metaKey;
                case 1: return event.which == 1 && event.metaKey;
                default: return false;
              }
            };
        
          } else {
            isButton = function(event, code) {
              return event.which ? (event.which === code + 1) : (event.button === code);
            };
          }
        
          return {
            isLeftClick:   function(event) { return isButton(event, 0) },
            isMiddleClick: function(event) { return isButton(event, 1) },
            isRightClick:  function(event) { return isButton(event, 2) },
        
            element: function(event) {
              event = Event.extend(event);
        
              var node          = event.target,
                  type          = event.type,
                  currentTarget = event.currentTarget;
        
              if (currentTarget && currentTarget.tagName) {
                // Firefox screws up the "click" event when moving between radio buttons
                // via arrow keys. It also screws up the "load" and "error" events on images,
                // reporting the document as the target instead of the original image.
                if (type === 'load' || type === 'error' ||
                  (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'
                    && currentTarget.type === 'radio'))
                      node = currentTarget;
              }
              if (node.nodeType == Node.TEXT_NODE) node = node.parentNode;
              return Element.extend(node);
            },
        
            findElement: function(event, expression) {
              var element = Event.element(event);
              if (!expression) return element;
              var elements = [element].concat(element.ancestors());
              return Selector.findElement(elements, expression, 0);
            },
        
            pointer: function(event) {
              var docElement = document.documentElement,
              body = document.body || { scrollLeft: 0, scrollTop: 0 };
              return {
                x: event.pageX || (event.clientX +
                  (docElement.scrollLeft || body.scrollLeft) -
                  (docElement.clientLeft || 0)),
                y: event.pageY || (event.clientY +
                  (docElement.scrollTop || body.scrollTop) -
                  (docElement.clientTop || 0))
              };
            },
        
            pointerX: function(event) { return Event.pointer(event).x },
            pointerY: function(event) { return Event.pointer(event).y },
        
            stop: function(event) {
              Event.extend(event);
              event.preventDefault();
              event.stopPropagation();
              event.stopped = true;
            }
          };
        })();
        
        Event.extend = (function() {
          var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
            m[name] = Event.Methods[name].methodize();
            return m;
          });
        
          if (Prototype.Browser.IE) {
            Object.extend(methods, {
              stopPropagation: function() { this.cancelBubble = true },
              preventDefault:  function() { this.returnValue = false },
              inspect: function() { return "[object Event]" }
            });
        
            return function(event) {
              if (!event) return false;
              if (event._extendedByPrototype) return event;
        
              event._extendedByPrototype = Prototype.emptyFunction;
              var pointer = Event.pointer(event);
              Object.extend(event, {
                target: event.srcElement,
                relatedTarget: Event.relatedTarget(event),
                pageX:  pointer.x,
                pageY:  pointer.y
              });
              return Object.extend(event, methods);
            };
        
          } else {
            Event.prototype = Event.prototype || document.createEvent("HTMLEvents")['__proto__'];
            Object.extend(Event.prototype, methods);
            return Prototype.K;
          }
        })();
        
        Object.extend(Event, (function() {
          var cache = Event.cache;
        
          function getEventID(element) {
            if (element._prototypeEventID) return element._prototypeEventID[0];
            arguments.callee.id = arguments.callee.id || 1;
            return element._prototypeEventID = [++arguments.callee.id];
          }
        
          function getDOMEventName(eventName) {
            if (eventName && eventName.include(':')) return "dataavailable";
            return eventName;
          }
        
          function getCacheForID(id) {
            return cache[id] = cache[id] || { };
          }
        
          function getWrappersForEventName(id, eventName) {
            var c = getCacheForID(id);
            return c[eventName] = c[eventName] || [];
          }
        
          function createWrapper(element, eventName, handler) {
            var id = getEventID(element);
            var c = getWrappersForEventName(id, eventName);
            if (c.pluck("handler").include(handler)) return false;
        
            var wrapper = function(event) {
              if (!Event || !Event.extend ||
                (event.eventName && event.eventName != eventName))
                  return false;
        
              Event.extend(event);
              handler.call(element, event);
            };
        
            wrapper.handler = handler;
            c.push(wrapper);
            return wrapper;
          }
        
          function findWrapper(id, eventName, handler) {
            var c = getWrappersForEventName(id, eventName);
            return c.find(function(wrapper) { return wrapper.handler == handler });
          }
        
          function destroyWrapper(id, eventName, handler) {
            var c = getCacheForID(id);
            if (!c[eventName]) return false;
            c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
          }
        
          function destroyCache() {
            for (var id in cache)
              for (var eventName in cache[id])
                cache[id][eventName] = null;
          }
        
        
          // Internet Explorer needs to remove event handlers on page unload
          // in order to avoid memory leaks.
          if (window.attachEvent) {
            window.attachEvent("onunload", destroyCache);
          }
        
          // Safari has a dummy event handler on page unload so that it won't
          // use its bfcache. Safari <= 3.1 has an issue with restoring the "document"
          // object when page is returned to via the back button using its bfcache.
          if (Prototype.Browser.WebKit) {
            window.addEventListener('unload', Prototype.emptyFunction, false);
          }
        
          return {
            observe: function(element, eventName, handler) {
              element = $(element);
              var name = getDOMEventName(eventName);
        
              var wrapper = createWrapper(element, eventName, handler);
              if (!wrapper) return element;
        
              if (element.addEventListener) {
                element.addEventListener(name, wrapper, false);
              } else {
                element.attachEvent("on" + name, wrapper);
              }
        
              return element;
            },
        
            stopObserving: function(element, eventName, handler) {
              element = $(element);
              var id = getEventID(element), name = getDOMEventName(eventName);
        
              if (!handler && eventName) {
                getWrappersForEventName(id, eventName).each(function(wrapper) {
                  element.stopObserving(eventName, wrapper.handler);
                });
                return element;
        
              } else if (!eventName) {
                Object.keys(getCacheForID(id)).each(function(eventName) {
                  element.stopObserving(eventName);
                });
                return element;
              }
        
              var wrapper = findWrapper(id, eventName, handler);
              if (!wrapper) return element;
        
              if (element.removeEventListener) {
                element.removeEventListener(name, wrapper, false);
              } else {
                element.detachEvent("on" + name, wrapper);
              }
        
              destroyWrapper(id, eventName, handler);
        
              return element;
            },
        
            fire: function(element, eventName, memo) {
              element = $(element);
              if (element == document && document.createEvent && !element.dispatchEvent)
                element = document.documentElement;
        
              var event;
              if (document.createEvent) {
                event = document.createEvent("HTMLEvents");
                event.initEvent("dataavailable", true, true);
              } else {
                event = document.createEventObject();
                event.eventType = "ondataavailable";
              }
        
              event.eventName = eventName;
              event.memo = memo || { };
        
              if (document.createEvent) {
                element.dispatchEvent(event);
              } else {
                element.fireEvent(event.eventType, event);
              }
        
              return Event.extend(event);
            }
          };
        })());
        
        Object.extend(Event, Event.Methods);
        
        Element.addMethods({
          fire:          Event.fire,
          observe:       Event.observe,
          stopObserving: Event.stopObserving
        });
        
        Object.extend(document, {
          fire:          Element.Methods.fire.methodize(),
          observe:       Element.Methods.observe.methodize(),
          stopObserving: Element.Methods.stopObserving.methodize(),
          loaded:        false
        });
        
        (function() {
          /* Support for the DOMContentLoaded event is based on work by Dan Webb,
             Matthias Miller, Dean Edwards and John Resig. */
        
          var timer;
        
          function fireContentLoadedEvent() {
            if (document.loaded) return;
            if (timer) window.clearInterval(timer);
            document.fire("dom:loaded");
            document.loaded = true;
          }
        
          if (document.addEventListener) {
            if (Prototype.Browser.WebKit) {
              timer = window.setInterval(function() {
                if (/loaded|complete/.test(document.readyState))
                  fireContentLoadedEvent();
              }, 0);
        
              Event.observe(window, "load", fireContentLoadedEvent);
        
            } else {
              document.addEventListener("DOMContentLoaded",
                fireContentLoadedEvent, false);
            }
        
          } else {
            document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
            $("__onDOMContentLoaded").onreadystatechange = function() {
              if (this.readyState == "complete") {
                this.onreadystatechange = null;
                fireContentLoadedEvent();
              }
            };
          }
        })();
        /*------------------------------- DEPRECATED -------------------------------*/
        
        Hash.toQueryString = Object.toQueryString;
        
        var Toggle = { display: Element.toggle };
        
        Element.Methods.childOf = Element.Methods.descendantOf;
        
        var Insertion = {
          Before: function(element, content) {
            return Element.insert(element, {before:content});
          },
        
          Top: function(element, content) {
            return Element.insert(element, {top:content});
          },
        
          Bottom: function(element, content) {
            return Element.insert(element, {bottom:content});
          },
        
          After: function(element, content) {
            return Element.insert(element, {after:content});
          }
        };
        
        var $continue = new Error('"throw $continue" is deprecated, use "return" instead');
        
        // This should be moved to script.aculo.us; notice the deprecated methods
        // further below, that map to the newer Element methods.
        var Position = {
          // set to true if needed, warning: firefox performance problems
          // NOT neeeded for page scrolling, only if draggable contained in
          // scrollable elements
          includeScrollOffsets: false,
        
          // must be called before calling withinIncludingScrolloffset, every time the
          // page is scrolled
          prepare: function() {
            this.deltaX =  window.pageXOffset
                        || document.documentElement.scrollLeft
                        || document.body.scrollLeft
                        || 0;
            this.deltaY =  window.pageYOffset
                        || document.documentElement.scrollTop
                        || document.body.scrollTop
                        || 0;
          },
        
          // caches x/y coordinate pair to use with overlap
          within: function(element, x, y) {
            if (this.includeScrollOffsets)
              return this.withinIncludingScrolloffsets(element, x, y);
            this.xcomp = x;
            this.ycomp = y;
            this.offset = Element.cumulativeOffset(element);
        
            return (y >= this.offset[1] &&
                    y <  this.offset[1] + element.offsetHeight &&
                    x >= this.offset[0] &&
                    x <  this.offset[0] + element.offsetWidth);
          },
        
          withinIncludingScrolloffsets: function(element, x, y) {
            var offsetcache = Element.cumulativeScrollOffset(element);
        
            this.xcomp = x + offsetcache[0] - this.deltaX;
            this.ycomp = y + offsetcache[1] - this.deltaY;
            this.offset = Element.cumulativeOffset(element);
        
            return (this.ycomp >= this.offset[1] &&
                    this.ycomp <  this.offset[1] + element.offsetHeight &&
                    this.xcomp >= this.offset[0] &&
                    this.xcomp <  this.offset[0] + element.offsetWidth);
          },
        
          // within must be called directly before
          overlap: function(mode, element) {
            if (!mode) return 0;
            if (mode == 'vertical')
              return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
                element.offsetHeight;
            if (mode == 'horizontal')
              return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
                element.offsetWidth;
          },
        
          // Deprecation layer -- use newer Element methods now (1.5.2).
        
          cumulativeOffset: Element.Methods.cumulativeOffset,
        
          positionedOffset: Element.Methods.positionedOffset,
        
          absolutize: function(element) {
            Position.prepare();
            return Element.absolutize(element);
          },
        
          relativize: function(element) {
            Position.prepare();
            return Element.relativize(element);
          },
        
          realOffset: Element.Methods.cumulativeScrollOffset,
        
          offsetParent: Element.Methods.getOffsetParent,
        
          page: Element.Methods.viewportOffset,
        
          clone: function(source, target, options) {
            options = options || { };
            return Element.clonePosition(target, source, options);
          }
        };
        
        /*--------------------------------------------------------------------------*/
        
        if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
          function iter(name) {
            return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
          }
        
          instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
          function(element, className) {
            className = className.toString().strip();
            var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
            return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
          } : function(element, className) {
            className = className.toString().strip();
            var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
            if (!classNames && !className) return elements;
        
            var nodes = $(element).getElementsByTagName('*');
            className = ' ' + className + ' ';
        
            for (var i = 0, child, cn; child = nodes[i]; i++) {
              if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
                  (classNames && classNames.all(function(name) {
                    return !name.toString().blank() && cn.include(' ' + name + ' ');
                  }))))
                elements.push(Element.extend(child));
            }
            return elements;
          };
        
          return function(className, parentElement) {
            return $(parentElement || document.body).getElementsByClassName(className);
          };
        }(Element.Methods);
        
        /*--------------------------------------------------------------------------*/
        
        Element.ClassNames = Class.create();
        Element.ClassNames.prototype = {
          initialize: function(element) {
            this.element = $(element);
          },
        
          _each: function(iterator) {
            this.element.className.split(/\s+/).select(function(name) {
              return name.length > 0;
            })._each(iterator);
          },
        
          set: function(className) {
            this.element.className = className;
          },
        
          add: function(classNameToAdd) {
            if (this.include(classNameToAdd)) return;
            this.set($A(this).concat(classNameToAdd).join(' '));
          },
        
          remove: function(classNameToRemove) {
            if (!this.include(classNameToRemove)) return;
            this.set($A(this).without(classNameToRemove).join(' '));
          },
        
          toString: function() {
            return $A(this).join(' ');
          }
        };
        
        Object.extend(Element.ClassNames.prototype, Enumerable);
        
        /*--------------------------------------------------------------------------*/
        
        Element.addMethods();
        var search_index = [
          { method: 'extended', module: 'inheritviews::pathscontainer', html: '<a href="classes/InheritViews/PathsContainer.html#M000001"><span class="method_name">extended</span> <span class="module_name">(InheritViews::PathsContainer)</span></a>' },
          { method: 'find_parent_template', module: 'inheritviews::pathset', html: '<a href="classes/InheritViews/PathSet.html#M000012"><span class="method_name">find_parent_template</span> <span class="module_name">(InheritViews::PathSet)</span></a>' },
          { method: 'find_template', module: 'inheritviews::pathset', html: '<a href="classes/InheritViews/PathSet.html#M000010"><span class="method_name">find_template</span> <span class="module_name">(InheritViews::PathSet)</span></a>' },
          { method: 'included', module: 'inheritviews::actionview', html: '<a href="classes/InheritViews/ActionView.html#M000006"><span class="method_name">included</span> <span class="module_name">(InheritViews::ActionView)</span></a>' },
          { method: 'inherit_view_paths', module: 'inheritviews::pathscontainer', html: '<a href="classes/InheritViews/PathsContainer.html#M000004"><span class="method_name">inherit_view_paths</span> <span class="module_name">(InheritViews::PathsContainer)</span></a>' },
          { method: 'inherit_view_paths=', module: 'inheritviews::pathscontainer', html: '<a href="classes/InheritViews/PathsContainer.html#M000005"><span class="method_name">inherit_view_paths=</span> <span class="module_name">(InheritViews::PathsContainer)</span></a>' },
          { method: 'inherit_views', module: 'inheritviews::actmethod', html: '<a href="classes/InheritViews/ActMethod.html#M000009"><span class="method_name">inherit_views</span> <span class="module_name">(InheritViews::ActMethod)</span></a>' },
          { method: 'inherit_views=', module: 'inheritviews::pathscontainer', html: '<a href="classes/InheritViews/PathsContainer.html#M000003"><span class="method_name">inherit_views=</span> <span class="module_name">(InheritViews::PathsContainer)</span></a>' },
          { method: 'inherit_views?', module: 'inheritviews::pathscontainer', html: '<a href="classes/InheritViews/PathsContainer.html#M000002"><span class="method_name">inherit_views?</span> <span class="module_name">(InheritViews::PathsContainer)</span></a>' },
          { method: 'orig_find_template', module: 'inheritviews::pathset', html: '<a href="classes/InheritViews/PathSet.html#M000011"><span class="method_name">orig_find_template</span> <span class="module_name">(InheritViews::PathSet)</span></a>' },
          { method: 'render_with_parent', module: 'inheritviews::actionview', html: '<a href="classes/InheritViews/ActionView.html#M000008"><span class="method_name">render_with_parent</span> <span class="module_name">(InheritViews::ActionView)</span></a>' },
          { method: 'view_paths=', module: 'inheritviews::actionview', html: '<a href="classes/InheritViews/ActionView.html#M000007"><span class="method_name">view_paths=</span> <span class="module_name">(InheritViews::ActionView)</span></a>' },
        ]
        $(document).observe('dom:loaded', function() {
        	// Setup search-during-typing.
        	new Form.Element.Observer('search', 0.3, function(element, value) {
        		performSearch();
        	});
        	
        	// Remove the default search box value when the user puts the focus on
        	// the search box for the first time.
        	var search_box = $('search');
        	if ($F('search') == 'Enter search terms...') {
        		search_box.observe('focus', function() {
        			if (search_box.hasClassName('untouched')) {
        				search_box.removeClassName('untouched');
        				search_box.value = '';
        			}
        		});
        	} else {
        		search_box.removeClassName('untouched');
        	}
        });
        
        function searchInIndex(query) {
        	var i;
        	var results = [];
        	query = query.toLowerCase();
        	for (i = 0; i < search_index.length; i++) {
        		if (search_index[i].method.indexOf(query) != -1) {
        			results.push(search_index[i]);
        		}
        	}
        	return results;
        }
        
        function buildHtmlForResults(results) {
        	var html = "";
        	var i;
        	for (i = 0; i < results.length; i++) {
        		html += '<li>' + results[i].html + '</li>';
        	}
        	return html;
        }
        
        function performSearch() {
        	var query = $F('search');
        	if (query == '') {
        		$('index-entries').show();
        		$('search-results').hide();
        	} else {
        		var results = searchInIndex(query);
        		$('search-results').update(buildHtmlForResults(results));
        		$('index-entries').hide();
        		$('search-results').show();
        	}
        	return false;
        }
      </script>
      <form onsubmit='return performSearch()'>
        <input class='untouched' id='search' type='text' value='Enter search terms...'>
      </form>
      <ol class='methods' id='search-results' style='display: none'></ol>
      <ol class='methods' id='index-entries'>
        <li><a href="classes/InheritViews/PathsContainer.html#M000001"><span class="method_name">extended</span> <span class="module_name">(InheritViews::PathsContainer)</span></a></li>
        <li><a href="classes/InheritViews/PathSet.html#M000012"><span class="method_name">find_parent_template</span> <span class="module_name">(InheritViews::PathSet)</span></a></li>
        <li><a href="classes/InheritViews/PathSet.html#M000010"><span class="method_name">find_template</span> <span class="module_name">(InheritViews::PathSet)</span></a></li>
        <li><a href="classes/InheritViews/ActionView.html#M000006"><span class="method_name">included</span> <span class="module_name">(InheritViews::ActionView)</span></a></li>
        <li><a href="classes/InheritViews/PathsContainer.html#M000004"><span class="method_name">inherit_view_paths</span> <span class="module_name">(InheritViews::PathsContainer)</span></a></li>
        <li><a href="classes/InheritViews/PathsContainer.html#M000005"><span class="method_name">inherit_view_paths=</span> <span class="module_name">(InheritViews::PathsContainer)</span></a></li>
        <li><a href="classes/InheritViews/ActMethod.html#M000009"><span class="method_name">inherit_views</span> <span class="module_name">(InheritViews::ActMethod)</span></a></li>
        <li><a href="classes/InheritViews/PathsContainer.html#M000003"><span class="method_name">inherit_views=</span> <span class="module_name">(InheritViews::PathsContainer)</span></a></li>
        <li><a href="classes/InheritViews/PathsContainer.html#M000002"><span class="method_name">inherit_views?</span> <span class="module_name">(InheritViews::PathsContainer)</span></a></li>
        <li><a href="classes/InheritViews/PathSet.html#M000011"><span class="method_name">orig_find_template</span> <span class="module_name">(InheritViews::PathSet)</span></a></li>
        <li><a href="classes/InheritViews/ActionView.html#M000008"><span class="method_name">render_with_parent</span> <span class="module_name">(InheritViews::ActionView)</span></a></li>
        <li><a href="classes/InheritViews/ActionView.html#M000007"><span class="method_name">view_paths=</span> <span class="module_name">(InheritViews::ActionView)</span></a></li>
      </ol>
    </div>
  </body>
</html>