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org.wicketstuff.jslibraries.js.swfobject-2.1.js Maven / Gradle / Ivy

/*! SWFObject v2.1 
	Copyright (c) 2007-2008 Geoff Stearns, Michael Williams, and Bobby van der Sluis
	This software is released under the MIT License 
*/

var swfobject = function() {
	
	var UNDEF = "undefined",
		OBJECT = "object",
		SHOCKWAVE_FLASH = "Shockwave Flash",
		SHOCKWAVE_FLASH_AX = "ShockwaveFlash.ShockwaveFlash",
		FLASH_MIME_TYPE = "application/x-shockwave-flash",
		EXPRESS_INSTALL_ID = "SWFObjectExprInst",
		
		win = window,
		doc = document,
		nav = navigator,
		
		domLoadFnArr = [],
		regObjArr = [],
		objIdArr = [],
		listenersArr = [],
		script,
		timer = null,
		storedAltContent = null,
		storedAltContentId = null,
		isDomLoaded = false,
		isExpressInstallActive = false;
	
	/* Centralized function for browser feature detection
		- Proprietary feature detection (conditional compiling) is used to detect Internet Explorer's features
		- User agent string detection is only used when no alternative is possible
		- Is executed directly for optimal performance
	*/	
	var ua = function() {
		var w3cdom = typeof doc.getElementById != UNDEF && typeof doc.getElementsByTagName != UNDEF && typeof doc.createElement != UNDEF,
			playerVersion = [0,0,0],
			d = null;
		if (typeof nav.plugins != UNDEF && typeof nav.plugins[SHOCKWAVE_FLASH] == OBJECT) {
			d = nav.plugins[SHOCKWAVE_FLASH].description;
			if (d && !(typeof nav.mimeTypes != UNDEF && nav.mimeTypes[FLASH_MIME_TYPE] && !nav.mimeTypes[FLASH_MIME_TYPE].enabledPlugin)) { // navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin indicates whether plug-ins are enabled or disabled in Safari 3+
				d = d.replace(/^.*\s+(\S+\s+\S+$)/, "$1");
				playerVersion[0] = parseInt(d.replace(/^(.*)\..*$/, "$1"), 10);
				playerVersion[1] = parseInt(d.replace(/^.*\.(.*)\s.*$/, "$1"), 10);
				playerVersion[2] = /r/.test(d) ? parseInt(d.replace(/^.*r(.*)$/, "$1"), 10) : 0;
			}
		}
		else if (typeof win.ActiveXObject != UNDEF) {
			var a = null, fp6Crash = false;
			try {
				a = new ActiveXObject(SHOCKWAVE_FLASH_AX + ".7");
			}
			catch(e) {
				try { 
					a = new ActiveXObject(SHOCKWAVE_FLASH_AX + ".6");
					playerVersion = [6,0,21];
					a.AllowScriptAccess = "always";	 // Introduced in fp6.0.47
				}
				catch(e) {
					if (playerVersion[0] == 6) {
						fp6Crash = true;
					}
				}
				if (!fp6Crash) {
					try {
						a = new ActiveXObject(SHOCKWAVE_FLASH_AX);
					}
					catch(e) {}
				}
			}
			if (!fp6Crash && a) { // a will return null when ActiveX is disabled
				try {
					d = a.GetVariable("$version");	// Will crash fp6.0.21/23/29
					if (d) {
						d = d.split(" ")[1].split(",");
						playerVersion = [parseInt(d[0], 10), parseInt(d[1], 10), parseInt(d[2], 10)];
					}
				}
				catch(e) {}
			}
		}
		var u = nav.userAgent.toLowerCase(),
			p = nav.platform.toLowerCase(),
			webkit = /webkit/.test(u) ? parseFloat(u.replace(/^.*webkit\/(\d+(\.\d+)?).*$/, "$1")) : false, // returns either the webkit version or false if not webkit
			ie = false,
			windows = p ? /win/.test(p) : /win/.test(u),
			mac = p ? /mac/.test(p) : /mac/.test(u);
		/*@cc_on
			ie = true;
			@if (@_win32)
				windows = true;
			@elif (@_mac)
				mac = true;
			@end
		@*/
		return { w3cdom:w3cdom, pv:playerVersion, webkit:webkit, ie:ie, win:windows, mac:mac };
	}();

	/* Cross-browser onDomLoad
		- Based on Dean Edwards' solution: http://dean.edwards.name/weblog/2006/06/again/
		- Will fire an event as soon as the DOM of a page is loaded (supported by Gecko based browsers - like Firefox -, IE, Opera9+, Safari)
	*/ 
	var onDomLoad = function() {
		if (!ua.w3cdom) {
			return;
		}
		addDomLoadEvent(main);
		if (ua.ie && ua.win) {
			try {	 // Avoid a possible Operation Aborted error
				doc.write(""); // String is split into pieces to avoid Norton AV to add code that can cause errors 
				script = getElementById("__ie_ondomload");
				if (script) {
					addListener(script, "onreadystatechange", checkReadyState);
				}
			}
			catch(e) {}
		}
		if (ua.webkit && typeof doc.readyState != UNDEF) {
			timer = setInterval(function() { if (/loaded|complete/.test(doc.readyState)) { callDomLoadFunctions(); }}, 10);
		}
		if (typeof doc.addEventListener != UNDEF) {
			doc.addEventListener("DOMContentLoaded", callDomLoadFunctions, null);
		}
		addLoadEvent(callDomLoadFunctions);
	}();
	
	function checkReadyState() {
		if (script.readyState == "complete") {
			script.parentNode.removeChild(script);
			callDomLoadFunctions();
		}
	}
	
	function callDomLoadFunctions() {
		if (isDomLoaded) {
			return;
		}
		if (ua.ie && ua.win) { // Test if we can really add elements to the DOM; we don't want to fire it too early
			var s = createElement("span");
			try { // Avoid a possible Operation Aborted error
				var t = doc.getElementsByTagName("body")[0].appendChild(s);
				t.parentNode.removeChild(t);
			}
			catch (e) {
				return;
			}
		}
		isDomLoaded = true;
		if (timer) {
			clearInterval(timer);
			timer = null;
		}
		var dl = domLoadFnArr.length;
		for (var i = 0; i < dl; i++) {
			domLoadFnArr[i]();
		}
	}
	
	function addDomLoadEvent(fn) {
		if (isDomLoaded) {
			fn();
		}
		else { 
			domLoadFnArr[domLoadFnArr.length] = fn; // Array.push() is only available in IE5.5+
		}
	}
	
	/* Cross-browser onload
		- Based on James Edwards' solution: http://brothercake.com/site/resources/scripts/onload/
		- Will fire an event as soon as a web page including all of its assets are loaded 
	 */
	function addLoadEvent(fn) {
		if (typeof win.addEventListener != UNDEF) {
			win.addEventListener("load", fn, false);
		}
		else if (typeof doc.addEventListener != UNDEF) {
			doc.addEventListener("load", fn, false);
		}
		else if (typeof win.attachEvent != UNDEF) {
			addListener(win, "onload", fn);
		}
		else if (typeof win.onload == "function") {
			var fnOld = win.onload;
			win.onload = function() {
				fnOld();
				fn();
			};
		}
		else {
			win.onload = fn;
		}
	}
	
	/* Main function
		- Will preferably execute onDomLoad, otherwise onload (as a fallback)
	*/
	function main() { // Static publishing only
		var rl = regObjArr.length;
		for (var i = 0; i < rl; i++) { // For each registered object element
			var id = regObjArr[i].id;
			if (ua.pv[0] > 0) {
				var obj = getElementById(id);
				if (obj) {
					regObjArr[i].width = obj.getAttribute("width") ? obj.getAttribute("width") : "0";
					regObjArr[i].height = obj.getAttribute("height") ? obj.getAttribute("height") : "0";
					if (hasPlayerVersion(regObjArr[i].swfVersion)) { // Flash plug-in version >= Flash content version: Houston, we have a match!
						if (ua.webkit && ua.webkit < 312) { // Older webkit engines ignore the object element's nested param elements
							fixParams(obj);
						}
						setVisibility(id, true);
					}
					else if (regObjArr[i].expressInstall && !isExpressInstallActive && hasPlayerVersion("6.0.65") && (ua.win || ua.mac)) { // Show the Adobe Express Install dialog if set by the web page author and if supported (fp6.0.65+ on Win/Mac OS only)
						showExpressInstall(regObjArr[i]);
					}
					else { // Flash plug-in and Flash content version mismatch: display alternative content instead of Flash content
						displayAltContent(obj);
					}
				}
			}
			else {	// If no fp is installed, we let the object element do its job (show alternative content)
				setVisibility(id, true);
			}
		}
	}
	
	/* Fix nested param elements, which are ignored by older webkit engines
		- This includes Safari up to and including version 1.2.2 on Mac OS 10.3
		- Fall back to the proprietary embed element
	*/
	function fixParams(obj) {
		var nestedObj = obj.getElementsByTagName(OBJECT)[0];
		if (nestedObj) {
			var e = createElement("embed"), a = nestedObj.attributes;
			if (a) {
				var al = a.length;
				for (var i = 0; i < al; i++) {
					if (a[i].nodeName == "DATA") {
						e.setAttribute("src", a[i].nodeValue);
					}
					else {
						e.setAttribute(a[i].nodeName, a[i].nodeValue);
					}
				}
			}
			var c = nestedObj.childNodes;
			if (c) {
				var cl = c.length;
				for (var j = 0; j < cl; j++) {
					if (c[j].nodeType == 1 && c[j].nodeName == "PARAM") {
						e.setAttribute(c[j].getAttribute("name"), c[j].getAttribute("value"));
					}
				}
			}
			obj.parentNode.replaceChild(e, obj);
		}
	}
	
	/* Show the Adobe Express Install dialog
		- Reference: http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=6a253b75
	*/
	function showExpressInstall(regObj) {
		isExpressInstallActive = true;
		var obj = getElementById(regObj.id);
		if (obj) {
			if (regObj.altContentId) {
				var ac = getElementById(regObj.altContentId);
				if (ac) {
					storedAltContent = ac;
					storedAltContentId = regObj.altContentId;
				}
			}
			else {
				storedAltContent = abstractAltContent(obj);
			}
			if (!(/%$/.test(regObj.width)) && parseInt(regObj.width, 10) < 310) {
				regObj.width = "310";
			}
			if (!(/%$/.test(regObj.height)) && parseInt(regObj.height, 10) < 137) {
				regObj.height = "137";
			}
			doc.title = doc.title.slice(0, 47) + " - Flash Player Installation";
			var pt = ua.ie && ua.win ? "ActiveX" : "PlugIn",
				dt = doc.title,
				fv = "MMredirectURL=" + win.location + "&MMplayerType=" + pt + "&MMdoctitle=" + dt,
				replaceId = regObj.id;
			// For IE when a SWF is loading (AND: not available in cache) wait for the onload event to fire to remove the original object element
			// In IE you cannot properly cancel a loading SWF file without breaking browser load references, also obj.onreadystatechange doesn't work
			if (ua.ie && ua.win && obj.readyState != 4) {
				var newObj = createElement("div");
				replaceId += "SWFObjectNew";
				newObj.setAttribute("id", replaceId);
				obj.parentNode.insertBefore(newObj, obj); // Insert placeholder div that will be replaced by the object element that loads expressinstall.swf
				obj.style.display = "none";
				var fn = function() {
					obj.parentNode.removeChild(obj);
				};
				addListener(win, "onload", fn);
			}
			createSWF({ data:regObj.expressInstall, id:EXPRESS_INSTALL_ID, width:regObj.width, height:regObj.height }, { flashvars:fv }, replaceId);
		}
	}
	
	/* Functions to abstract and display alternative content
	*/
	function displayAltContent(obj) {
		if (ua.ie && ua.win && obj.readyState != 4) {
			// For IE when a SWF is loading (AND: not available in cache) wait for the onload event to fire to remove the original object element
			// In IE you cannot properly cancel a loading SWF file without breaking browser load references, also obj.onreadystatechange doesn't work
			var el = createElement("div");
			obj.parentNode.insertBefore(el, obj); // Insert placeholder div that will be replaced by the alternative content
			el.parentNode.replaceChild(abstractAltContent(obj), el);
			obj.style.display = "none";
			var fn = function() {
				obj.parentNode.removeChild(obj);
			};
			addListener(win, "onload", fn);
		}
		else {
			obj.parentNode.replaceChild(abstractAltContent(obj), obj);
		}
	} 

	function abstractAltContent(obj) {
		var ac = createElement("div");
		if (ua.win && ua.ie) {
			ac.innerHTML = obj.innerHTML;
		}
		else {
			var nestedObj = obj.getElementsByTagName(OBJECT)[0];
			if (nestedObj) {
				var c = nestedObj.childNodes;
				if (c) {
					var cl = c.length;
					for (var i = 0; i < cl; i++) {
						if (!(c[i].nodeType == 1 && c[i].nodeName == "PARAM") && !(c[i].nodeType == 8)) {
							ac.appendChild(c[i].cloneNode(true));
						}
					}
				}
			}
		}
		return ac;
	}
	
	/* Cross-browser dynamic SWF creation
	*/
	function createSWF(attObj, parObj, id) {
		var r, el = getElementById(id);
		if (el) {
			if (typeof attObj.id == UNDEF) { // if no 'id' is defined for the object element, it will inherit the 'id' from the alternative content
				attObj.id = id;
			}
			if (ua.ie && ua.win) { // IE, the object element and W3C DOM methods do not combine: fall back to outerHTML
				var att = "";
				for (var i in attObj) {
					if (attObj[i] != Object.prototype[i]) { // Filter out prototype additions from other potential libraries, like Object.prototype.toJSONString = function() {}
						if (i.toLowerCase() == "data") {
							parObj.movie = attObj[i];
						}
						else if (i.toLowerCase() == "styleclass") { // 'class' is an ECMA4 reserved keyword
							att += ' class="' + attObj[i] + '"';
						}
						else if (i.toLowerCase() != "classid") {
							att += ' ' + i + '="' + attObj[i] + '"';
						}
					}
				}
				var par = "";
				for (var j in parObj) {
					if (parObj[j] != Object.prototype[j]) { // Filter out prototype additions from other potential libraries
						par += '';
					}
				}
				el.outerHTML = '';
				objIdArr[objIdArr.length] = attObj.id; // Stored to fix object 'leaks' on unload (dynamic publishing only)
				r = getElementById(attObj.id);	
			}
			else if (ua.webkit && ua.webkit < 312) { // Older webkit engines ignore the object element's nested param elements: fall back to the proprietary embed element
				var e = createElement("embed");
				e.setAttribute("type", FLASH_MIME_TYPE);
				for (var k in attObj) {
					if (attObj[k] != Object.prototype[k]) { // Filter out prototype additions from other potential libraries
						if (k.toLowerCase() == "data") {
							e.setAttribute("src", attObj[k]);
						}
						else if (k.toLowerCase() == "styleclass") { // 'class' is an ECMA4 reserved keyword
							e.setAttribute("class", attObj[k]);
						}
						else if (k.toLowerCase() != "classid") { // Filter out IE specific attribute
							e.setAttribute(k, attObj[k]);
						}
					}
				}
				for (var l in parObj) {
					if (parObj[l] != Object.prototype[l]) { // Filter out prototype additions from other potential libraries
						if (l.toLowerCase() != "movie") { // Filter out IE specific param element
							e.setAttribute(l, parObj[l]);
						}
					}
				}
				el.parentNode.replaceChild(e, el);
				r = e;
			}
			else { // Well-behaving browsers
				var o = createElement(OBJECT);
				o.setAttribute("type", FLASH_MIME_TYPE);
				for (var m in attObj) {
					if (attObj[m] != Object.prototype[m]) { // Filter out prototype additions from other potential libraries
						if (m.toLowerCase() == "styleclass") { // 'class' is an ECMA4 reserved keyword
							o.setAttribute("class", attObj[m]);
						}
						else if (m.toLowerCase() != "classid") { // Filter out IE specific attribute
							o.setAttribute(m, attObj[m]);
						}
					}
				}
				for (var n in parObj) {
					if (parObj[n] != Object.prototype[n] && n.toLowerCase() != "movie") { // Filter out prototype additions from other potential libraries and IE specific param element
						createObjParam(o, n, parObj[n]);
					}
				}
				el.parentNode.replaceChild(o, el);
				r = o;
			}
		}
		return r;
	}
	
	function createObjParam(el, pName, pValue) {
		var p = createElement("param");
		p.setAttribute("name", pName);	
		p.setAttribute("value", pValue);
		el.appendChild(p);
	}
	
	/* Cross-browser SWF removal
		- Especially needed to safely and completely remove a SWF in Internet Explorer
	*/
	function removeSWF(id) {
		var obj = getElementById(id);
		if (obj && (obj.nodeName == "OBJECT" || obj.nodeName == "EMBED")) {
			if (ua.ie && ua.win) {
				if (obj.readyState == 4) {
					removeObjectInIE(id);
				}
				else {
					win.attachEvent("onload", function() {
						removeObjectInIE(id);
					});
				}
			}
			else {
				obj.parentNode.removeChild(obj);
			}
		}
	}
	
	function removeObjectInIE(id) {
		var obj = getElementById(id);
		if (obj) {
			for (var i in obj) {
				if (typeof obj[i] == "function") {
					obj[i] = null;
				}
			}
			obj.parentNode.removeChild(obj);
		}
	}
	
	/* Functions to optimize JavaScript compression
	*/
	function getElementById(id) {
		var el = null;
		try {
			el = doc.getElementById(id);
		}
		catch (e) {}
		return el;
	}
	
	function createElement(el) {
		return doc.createElement(el);
	}
	
	/* Updated attachEvent function for Internet Explorer
		- Stores attachEvent information in an Array, so on unload the detachEvent functions can be called to avoid memory leaks
	*/	
	function addListener(target, eventType, fn) {
		target.attachEvent(eventType, fn);
		listenersArr[listenersArr.length] = [target, eventType, fn];
	}
	
	/* Flash Player and SWF content version matching
	*/
	function hasPlayerVersion(rv) {
		var pv = ua.pv, v = rv.split(".");
		v[0] = parseInt(v[0], 10);
		v[1] = parseInt(v[1], 10) || 0; // supports short notation, e.g. "9" instead of "9.0.0"
		v[2] = parseInt(v[2], 10) || 0;
		return (pv[0] > v[0] || (pv[0] == v[0] && pv[1] > v[1]) || (pv[0] == v[0] && pv[1] == v[1] && pv[2] >= v[2])) ? true : false;
	}
	
	/* Cross-browser dynamic CSS creation
		- Based on Bobby van der Sluis' solution: http://www.bobbyvandersluis.com/articles/dynamicCSS.php
	*/	
	function createCSS(sel, decl) {
		if (ua.ie && ua.mac) {
			return;
		}
		var h = doc.getElementsByTagName("head")[0], s = createElement("style");
		s.setAttribute("type", "text/css");
		s.setAttribute("media", "screen");
		if (!(ua.ie && ua.win) && typeof doc.createTextNode != UNDEF) {
			s.appendChild(doc.createTextNode(sel + " {" + decl + "}"));
		}
		h.appendChild(s);
		if (ua.ie && ua.win && typeof doc.styleSheets != UNDEF && doc.styleSheets.length > 0) {
			var ls = doc.styleSheets[doc.styleSheets.length - 1];
			if (typeof ls.addRule == OBJECT) {
				ls.addRule(sel, decl);
			}
		}
	}
	
	function setVisibility(id, isVisible) {
		var v = isVisible ? "visible" : "hidden";
		if (isDomLoaded && getElementById(id)) {
			getElementById(id).style.visibility = v;
		}
		else {
			createCSS("#" + id, "visibility:" + v);
		}
	}

	/* Filter to avoid XSS attacks 
	*/
	function urlEncodeIfNecessary(s) {
		var regex = /[\\\"<>\.;]/;
		var hasBadChars = regex.exec(s) != null;
		return hasBadChars ? encodeURIComponent(s) : s;
	}
	
	/* Release memory to avoid memory leaks caused by closures, fix hanging audio/video threads and force open sockets/NetConnections to disconnect (Internet Explorer only)
	*/
	var cleanup = function() {
		if (ua.ie && ua.win) {
			window.attachEvent("onunload", function() {
				// remove listeners to avoid memory leaks
				var ll = listenersArr.length;
				for (var i = 0; i < ll; i++) {
					listenersArr[i][0].detachEvent(listenersArr[i][1], listenersArr[i][2]);
				}
				// cleanup dynamically embedded objects to fix audio/video threads and force open sockets and NetConnections to disconnect
				var il = objIdArr.length;
				for (var j = 0; j < il; j++) {
					removeSWF(objIdArr[j]);
				}
				// cleanup library's main closures to avoid memory leaks
				for (var k in ua) {
					ua[k] = null;
				}
				ua = null;
				for (var l in swfobject) {
					swfobject[l] = null;
				}
				swfobject = null;
			});
		}
	}();
	
	
	return {
		/* Public API
			- Reference: http://code.google.com/p/swfobject/wiki/SWFObject_2_0_documentation
		*/ 
		registerObject: function(objectIdStr, swfVersionStr, xiSwfUrlStr) {
			if (!ua.w3cdom || !objectIdStr || !swfVersionStr) {
				return;
			}
			var regObj = {};
			regObj.id = objectIdStr;
			regObj.swfVersion = swfVersionStr;
			regObj.expressInstall = xiSwfUrlStr ? xiSwfUrlStr : false;
			regObjArr[regObjArr.length] = regObj;
			setVisibility(objectIdStr, false);
		},
		
		getObjectById: function(objectIdStr) {
			var r = null;
			if (ua.w3cdom) {
				var o = getElementById(objectIdStr);
				if (o) {
					var n = o.getElementsByTagName(OBJECT)[0];
					if (!n || (n && typeof o.SetVariable != UNDEF)) {
							r = o;
					}
					else if (typeof n.SetVariable != UNDEF) {
						r = n;
					}
				}
			}
			return r;
		},
		
		embedSWF: function(swfUrlStr, replaceElemIdStr, widthStr, heightStr, swfVersionStr, xiSwfUrlStr, flashvarsObj, parObj, attObj) {
			if (!ua.w3cdom || !swfUrlStr || !replaceElemIdStr || !widthStr || !heightStr || !swfVersionStr) {
				return;
			}
			widthStr += ""; // Auto-convert to string
			heightStr += "";
			if (hasPlayerVersion(swfVersionStr)) {
				setVisibility(replaceElemIdStr, false);
				var att = {};
				if (attObj && typeof attObj === OBJECT) {
					for (var i in attObj) {
						if (attObj[i] != Object.prototype[i]) { // Filter out prototype additions from other potential libraries
							att[i] = attObj[i];
						}
					}
				}
				att.data = swfUrlStr;
				att.width = widthStr;
				att.height = heightStr;
				var par = {}; 
				if (parObj && typeof parObj === OBJECT) {
					for (var j in parObj) {
						if (parObj[j] != Object.prototype[j]) { // Filter out prototype additions from other potential libraries
							par[j] = parObj[j];
						}
					}
				}
				if (flashvarsObj && typeof flashvarsObj === OBJECT) {
					for (var k in flashvarsObj) {
						if (flashvarsObj[k] != Object.prototype[k]) { // Filter out prototype additions from other potential libraries
							if (typeof par.flashvars != UNDEF) {
								par.flashvars += "&" + k + "=" + flashvarsObj[k];
							}
							else {
								par.flashvars = k + "=" + flashvarsObj[k];
							}
						}
					}
				}
				addDomLoadEvent(function() {
					createSWF(att, par, replaceElemIdStr);
					if (att.id == replaceElemIdStr) {
						setVisibility(replaceElemIdStr, true);
					}
				});
			}
			else if (xiSwfUrlStr && !isExpressInstallActive && hasPlayerVersion("6.0.65") && (ua.win || ua.mac)) {
				isExpressInstallActive = true; // deferred execution
				setVisibility(replaceElemIdStr, false);
				addDomLoadEvent(function() {
					var regObj = {};
					regObj.id = regObj.altContentId = replaceElemIdStr;
					regObj.width = widthStr;
					regObj.height = heightStr;
					regObj.expressInstall = xiSwfUrlStr;
					showExpressInstall(regObj);
				});
			}
		},
		
		getFlashPlayerVersion: function() {
			return { major:ua.pv[0], minor:ua.pv[1], release:ua.pv[2] };
		},
		
		hasFlashPlayerVersion: hasPlayerVersion,
		
		createSWF: function(attObj, parObj, replaceElemIdStr) {
			if (ua.w3cdom) {
				return createSWF(attObj, parObj, replaceElemIdStr);
			}
			else {
				return undefined;
			}
		},
		
		removeSWF: function(objElemIdStr) {
			if (ua.w3cdom) {
				removeSWF(objElemIdStr);
			}
		},
		
		createCSS: function(sel, decl) {
			if (ua.w3cdom) {
				createCSS(sel, decl);
			}
		},
		
		addDomLoadEvent: addDomLoadEvent,
		
		addLoadEvent: addLoadEvent,
		
		getQueryParamValue: function(param) {
			var q = doc.location.search || doc.location.hash;
			if (param == null) {
				return urlEncodeIfNecessary(q);
			}
			if (q) {
				var pairs = q.substring(1).split("&");
				for (var i = 0; i < pairs.length; i++) {
					if (pairs[i].substring(0, pairs[i].indexOf("=")) == param) {
						return urlEncodeIfNecessary(pairs[i].substring((pairs[i].indexOf("=") + 1)));
					}
				}
			}
			return "";
		},
		
		// For internal usage only
		expressInstallCallback: function() {
			if (isExpressInstallActive && storedAltContent) {
				var obj = getElementById(EXPRESS_INSTALL_ID);
				if (obj) {
					obj.parentNode.replaceChild(storedAltContent, obj);
					if (storedAltContentId) {
						setVisibility(storedAltContentId, true);
						if (ua.ie && ua.win) {
							storedAltContent.style.display = "block";
						}
					}
					storedAltContent = null;
					storedAltContentId = null;
					isExpressInstallActive = false;
				}
			} 
		}
	};
}();