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@@ -1,4 +1,4 @@
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-/*  Prototype JavaScript framework, version 1.3.0
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+/*  Prototype JavaScript framework, version 1.3.1
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  *  (c) 2005 Sam Stephenson <sam@conio.net>
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  *
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  *  THIS FILE IS AUTOMATICALLY GENERATED. When sending patches, please diff
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@@ -11,7 +11,7 @@
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 /*--------------------------------------------------------------------------*/
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 var Prototype = {
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-  Version: '1.3.0',
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+  Version: '1.3.1',
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   emptyFunction: function() {}
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 }
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0
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@@ -266,12 +266,16 @@
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   respondToReadyState: function(readyState) {
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     var event = Ajax.Request.Events[readyState];
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-    if (event == 'Complete' && this.responseIsFailure())
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+    if (event == 'Complete')
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       (this.options['on' + this.transport.status]
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-       || this.options.onFailure
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+       || this.options['on' + this.responseIsSuccess() ? 'Success' : 'Failure']
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        || Prototype.emptyFunction)(this.transport);
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-    (this.options['on' + event] || Prototype.emptyFunction)(this.transport);    
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+    (this.options['on' + event] || Prototype.emptyFunction)(this.transport);
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+
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+    /* Avoid memory leak in MSIE: clean up the oncomplete event handler */
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+    if (event == 'Complete')
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+      this.transport.onreadystatechange = Prototype.emptyFunction;
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   }
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 });
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@@ -292,7 +296,7 @@
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     var onComplete = this.options.onComplete || Prototype.emptyFunction;
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     this.options.onComplete = (function() {
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       this.updateContent();
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-      onComplete(this.transport);      
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+      onComplete(this.transport);
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     }).bind(this);
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     this.request(url);
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@@ -889,52 +893,59 @@
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     return element;
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   },
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+  observers: false,
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+  
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+  _observeAndCache: function(element, name, observer, useCapture) {
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+    if (!this.observers) this.observers = [];
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+    if (element.addEventListener) {
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+      this.observers.push([element, name, observer, useCapture]);
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+      element.addEventListener(name, observer, useCapture);
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+    } else if (element.attachEvent) {
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+      this.observers.push([element, name, observer, useCapture]);
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+      element.attachEvent('on' + name, observer);
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+    }
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+  },
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+  
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+  unloadCache: function() {
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+    if (!Event.observers) return;
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+    for (var i = 0; i < Event.observers.length; i++) {
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+      Event.stopObserving.apply(this, Event.observers[i]);
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+      Event.observers[i][0] = null;
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+    }
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+    Event.observers = false;
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+  },
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+
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   observe: function(element, name, observer, useCapture) {
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     var element = $(element);
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     useCapture = useCapture || false;
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-    if (name == 'keypress') {
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-      if (navigator.appVersion.indexOf('AppleWebKit') > 0) {
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-        element.addEventListener('keydown', observer, useCapture);
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-        return;
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-      }
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-      if (element.addEventListener) {
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-        element.addEventListener('keypress', observer, useCapture);
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-      } else if (element.attachEvent) {
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-        element.attachEvent('onkeydown', observer);
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-      }
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-    } else {
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-      if (element.addEventListener) {
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-        element.addEventListener(name, observer, useCapture);
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-      } else if (element.attachEvent) {
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-        element.attachEvent('on' + name, observer);
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-      }
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-    }
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+    if (name == 'keypress' &&
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+        ((navigator.appVersion.indexOf('AppleWebKit') > 0) 
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+        || element.attachEvent))
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+      name = 'keydown';
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+    
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+    this._observeAndCache(element, name, observer, useCapture);
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   },
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   stopObserving: function(element, name, observer, useCapture) {
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     var element = $(element);
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     useCapture = useCapture || false;
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-    if (name == 'keypress') {
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-      if (navigator.appVersion.indexOf('AppleWebKit') > 0) {
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-        element.removeEventListener('keydown', observer, useCapture);
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-        return;
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-      }
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-      if (element.removeEventListener) {
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-        element.removeEventListener('keypress', observer, useCapture);
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-      } else if (element.detachEvent) {
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-        element.detachEvent('onkeydown', observer);
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-      }
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-    } else {
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-      if (element.removeEventListener) {
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-        element.removeEventListener(name, observer, useCapture);
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-      } else if (element.detachEvent) {
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-        element.detachEvent('on' + name, observer);
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-      }
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+    if (name == 'keypress' &&
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+        ((navigator.appVersion.indexOf('AppleWebKit') > 0) 
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+        || element.detachEvent))
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+      name = 'keydown';
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+    
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+    if (element.removeEventListener) {
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+      element.removeEventListener(name, observer, useCapture);
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+    } else if (element.detachEvent) {
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+      element.detachEvent('on' + name, observer);
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     }
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   }
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 });
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+
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+/* prevent memory leaks in IE */
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+Event.observe(window, 'unload', Event.unloadCache, false);
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 var Position = {
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