oz.js

/* (c) 2007 - now() Ondrej Zara, 1.5 */
var OZ = {
	$:function(x) { return typeof(x) == "string" ? document.getElementById(x) : x; },
	opera:!!window.opera,
	ie:!!document.attachEvent && !window.opera,
	gecko:!!document.getAnonymousElementByAttribute,
	webkit:!!navigator.userAgent.match(/webkit/i),
	khtml:!!navigator.userAgent.match(/khtml/i) || !!navigator.userAgent.match(/konqueror/i),
	Event:{
		_id:0,
		_byName:{},
		_byID:{},
		add:function(elm,event,cb) {
			var id = OZ.Event._id++;
			var element = OZ.$(elm);
			var fnc = cb;
			if (element) {
				if (element.addEventListener) {
					element.addEventListener(event,fnc,false);
				} else if (element.attachEvent) {
					fnc = function() { return cb.apply(elm,arguments); }
					element.attachEvent("on"+event,fnc);
				}
			}
			if (!(event in OZ.Event._byName)) { OZ.Event._byName[event] = {}; }
			var obj = OZ.Event._byName[event];
			obj[id] = [element,event,fnc];
			OZ.Event._byID[id] = obj;
			return id;
		},
		remove:function(id) {
			var obj = OZ.Event._byID[id];
			if (!obj) { return; }
			var e = obj[id];
			var elm = e[0];
			if (elm) {
				if (elm.removeEventListener) {
					elm.removeEventListener(e[1],e[2],false);
				} else if (elm.detachEvent) {
					elm.detachEvent("on"+e[1],e[2]);
				}
			}
			delete OZ.Event._byID[id];
			delete obj[id];
		},
		stop:function(e) { e.stopPropagation ? e.stopPropagation() : e.cancelBubble = true; },
		prevent:function(e) { e.preventDefault ? e.preventDefault() : e.returnValue = false; },
		target:function(e) { return e.target || e.srcElement; }
	},
	Class:function() { 
		var c = function() {
			var init = arguments.callee.prototype.init;
			if (init) { init.apply(this,arguments); }
		};
		c.implement = function(parent) {
			for (var p in parent.prototype) { this.prototype[p] = parent.prototype[p]; }
			return this;
		};
		c.extend = function(parent) {
			var tmp = function(){};
			tmp.prototype = parent.prototype;
			this.prototype = new tmp();
			return this;
		};
		c.prototype.bind = function(fnc) { return fnc.bind(this); };
		c.prototype.dispatch = function(type, data) {
			var obj = {
				type:type,
				target:this,
				timeStamp:(new Date()).getTime(),
				data:data
			}
			var tocall = [];
			var list = OZ.Event._byName[type];
			for (var id in list) {
				var item = list[id];
				if (!item[0] || item[0] == this) { tocall.push(item[2]); }
			}
			var len = tocall.length;
			for (var i=0;i<len;i++) { tocall[i](obj); }
		}
		return c;
	},
	DOM:{
		elm:function(name, opts) {
			var elm = document.createElement(name);
			for (var p in opts) {
				var val = opts[p];
				if (p == "class") { p = "className"; }
				if (p in elm) { elm[p] = val; }
			}
			OZ.Style.set(elm, opts);
			return elm;
		},
		text:function(str) { return document.createTextNode(str); },
		clear:function(node) { while (node.firstChild) {node.removeChild(node.firstChild);} },
		pos:function(elm) { /* relative to _viewport_ */
			var cur = OZ.$(elm);
			var html = cur.ownerDocument.documentElement;
			var parent = cur.parentNode;
			var x = y = 0;
			if (cur == html) { return [x,y]; }
			while (1) {
				if (OZ.Style.get(cur,"position") == "fixed") {
					x += cur.offsetLeft;
					y += cur.offsetTop;
					return [x,y];
				}
				
				if (OZ.opera && (parent == html || OZ.Style.get(cur,"display") != "block")) { } else {
					x -= parent.scrollLeft;
					y -= parent.scrollTop;
				}
				if (parent == cur.offsetParent || cur.parentNode == html) {
					x += cur.offsetLeft;
					y += cur.offsetTop;
					cur = parent;
				}
				
				if (parent == html) { return [x,y]; }
				parent = parent.parentNode;
			}
		},
		scroll:function() { 
			var x = document.documentElement.scrollLeft || document.body.scrollLeft || 0;
			var y = document.documentElement.scrollTop || document.body.scrollTop || 0;
			return [x,y];
		},
		win:function() {
			var node = (document.compatMode == "CSS1Compat" ? document.documentElement : document.body);
			if (OZ.opera && parseFloat(navigator.appVersion) < 9.5) { node = document.body; }
			var x = node.clientWidth;
			var y = node.clientHeight;
			return [x,y];
		},
		hasClass:function(node, className) {
			var cn = OZ.$(node).className;
			var arr = (cn ? cn.split(" ") : []);
			return (arr.indexOf(className) != -1);
		},
		addClass:function(node,className) {
			if (OZ.DOM.hasClass(node, className)) { return; }
			var cn = OZ.$(node).className;
			var arr = (cn ? cn.split(" ") : []);
			arr.push(className);
			OZ.$(node).className = arr.join(" ");
		},
		removeClass:function(node, className) {
			if (!OZ.DOM.hasClass(node, className)) { return; }
			var cn = OZ.$(node).className;
			var arr = (cn ? cn.split(" ") : []);
			var arr = arr.filter(function($){ return $ != className; });
			OZ.$(node).className = arr.join(" ");
		},
		append:function() {
			if (arguments.length == 1) {
				var arr = arguments[0];
				var root = OZ.$(arr[0]);
				for (var i=1;i<arr.length;i++) { root.appendChild(OZ.$(arr[i])); }
			} else for (var i=0;i<arguments.length;i++) { OZ.DOM.append(arguments[i]); }
		}
	},
	Style:{
		get:function(elm, prop) {
			if (document.defaultView && document.defaultView.getComputedStyle) {
				try {
					var cs = elm.ownerDocument.defaultView.getComputedStyle(elm,"");
				} catch(e) {
					return false;
				}
				if (!cs) { return false; }
				return cs[prop];
			} else {
				return elm.currentStyle[prop];
			}
		},
		set:function(elm, obj) {
			for (var p in obj) { 
				var val = obj[p];
				if (p == "opacity" && OZ.ie) {
					p = "filter";
					val = "alpha(opacity="+Math.round(100*val)+")";
					elm.style.zoom = 1;
				} else if (p == "float") {
					p = (OZ.ie ? "styleFloat" : "cssFloat");
				}
				if (p in elm.style) { elm.style[p] = val; }
			}
		}
	},
	Request:function(url, callback, options) {
		var o = {data:false, method:"get", headers:{}, xml:false}
		for (var p in options) { o[p] = options[p]; }
		o.method = o.method.toUpperCase();
		
		var xhr = false;
		if (window.XMLHttpRequest) { xhr = new XMLHttpRequest(); }
		else if (window.ActiveXObject) { xhr = new ActiveXObject("Microsoft.XMLHTTP"); }
		else { return false; }
		xhr.open(o.method, url, true);
		xhr.onreadystatechange = function() {
			if (xhr.readyState != 4) { return; }
			if (!callback) { return; }
			var data = (o.xml ? xhr.responseXML : xhr.responseText);
			var headers = {};
			var h = xhr.getAllResponseHeaders();
			if (h) {
				h = h.split(/[\r\n]/);
				for (var i=0;i<h.length;i++) if (h[i]) {
					var v = h[i].match(/^([^:]+): *(.*)$/);
					headers[v[1]] = v[2];
				}
			}
			callback(data,xhr.status,headers);
		};
		if (o.method == "POST") { xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); }
		for (var p in o.headers) { xhr.setRequestHeader(p,o.headers[p]); }
		xhr.send(o.data || null);
		return xhr;
	}
}

if (!Function.prototype.bind) {
	Function.prototype.bind = function(thisObj) { 
		var fn = this;
		var args = Array.prototype.slice.call(arguments, 1); 
		return function() { 
			return fn.apply(thisObj, args.concat(Array.prototype.slice.call(arguments))); 
		}
	}
};

if (!Array.prototype.indexOf) { 
	Array.prototype.indexOf = function(item, from) {
	    var len = this.length;
	    var i = from || 0;
	    if (i < 0) { i += len; }
	    for (;i<len;i++) {
			if (i in this && this[i] === item) { return i; }
	    }
	    return -1;
	}
}
if (!Array.indexOf) {
	Array.indexOf = function(obj, item, from) { return Array.prototype.indexOf.call(obj, item, from); }
}

if (!Array.prototype.lastIndexOf) { 
	Array.prototype.lastIndexOf = function(item, from) {
	    var len = this.length;
		var i = from || len-1;
		if (i < 0) { i += len; }
	    for (;i>-1;i--) {
			if (i in this && this[i] === item) { return i; }
	    }
	    return -1;
	}
}
if (!Array.lastIndexOf) { 
	Array.lastIndexOf = function(obj, item, from) { return Array.prototype.lastIndexOf.call(obj, item, from); }
}

if (!Array.prototype.forEach) { 
	Array.prototype.forEach = function(cb, _this) {
	    var len = this.length;
	    for (var i=0;i<len;i++) { 
			if (i in this) { cb.call(_this, this[i], i, this); }
		}
	}
}
if (!Array.forEach) { 
	Array.forEach = function(obj, cb, _this) { Array.prototype.forEach.call(obj, cb, _this); }
}

if (!Array.prototype.every) { 
	Array.prototype.every = function(cb, _this) {
	    var len = this.length;
	    for (var i=0;i<len;i++) {
			if (i in this && !cb.call(_this, this[i], i, this)) { return false; }
	    }
	    return true;
	}
}
if (!Array.every) { 
	Array.every = function(obj, cb, _this) { return Array.prototype.every.call(obj, cb, _this); }
}

if (!Array.prototype.some) { 
	Array.prototype.some = function(cb, _this) {
		var len = this.length;
		for (var i=0;i<len;i++) {
			if (i in this && cb.call(_this, this[i], i, this)) { return true; }
		}
		return false;
	}
}
if (!Array.some) { 
	Array.some = function(obj, cb, _this) { return Array.prototype.some.call(obj, cb, _this); }
}

if (!Array.prototype.map) { 
	Array.prototype.map = function(cb, _this) {
		var len = this.length;
		var res = new Array(len);
		for (var i=0;i<len;i++) {
			if (i in this) { res[i] = cb.call(_this, this[i], i, this); }
		}
		return res;
	}
}
if (!Array.map) { 
	Array.map = function(obj, cb, _this) { return Array.prototype.map.call(obj, cb, _this); }
}

if (!Array.prototype.filter) { 
	Array.prototype.filter = function(cb, _this) {
		var len = this.length;
	    var res = [];
			for (var i=0;i<len;i++) {
				if (i in this) {
					var val = this[i];
					if (cb.call(_this, val, i, this)) { res.push(val); }
				}
			}
	    return res;
	}
}
if (!Array.filter) { 
	Array.filter = function(obj, cb, _this) { return Array.prototype.filter.call(obj, cb, _this); }
}