Chris@909: <attach event="ondocumentready" handler="parseStylesheets" />
Chris@909: <script>
Chris@909: /**
Chris@909:  *	Whatever:hover - V1.42.060206 - hover & active
Chris@909:  *	------------------------------------------------------------
Chris@909:  *	(c) 2005 - Peter Nederlof
Chris@909:  *	Peterned - http://www.xs4all.nl/~peterned/
Chris@909:  *	License  - http://creativecommons.org/licenses/LGPL/2.1/
Chris@909:  *
Chris@909:  *	Whatever:hover is free software; you can redistribute it and/or
Chris@909:  *	modify it under the terms of the GNU Lesser General Public
Chris@909:  *	License as published by the Free Software Foundation; either
Chris@909:  *	version 2.1 of the License, or (at your option) any later version.
Chris@909:  *
Chris@909:  *	Whatever:hover is distributed in the hope that it will be useful,
Chris@909:  *	but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@909:  *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Chris@909:  *	Lesser General Public License for more details.
Chris@909:  *
Chris@909:  *	Credits and thanks to:
Chris@909:  *	Arnoud Berendsen, Martin Reurings, Robert Hanson
Chris@909:  *
Chris@909:  *	howto: body { behavior:url("csshover.htc"); }
Chris@909:  *	------------------------------------------------------------
Chris@909:  */
Chris@909: 
Chris@909: var csshoverReg = /(^|\s)(([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active)/i,
Chris@909: currentSheet, doc = window.document, hoverEvents = [], activators = {
Chris@909: 	onhover:{on:'onmouseover', off:'onmouseout'},
Chris@909: 	onactive:{on:'onmousedown', off:'onmouseup'}
Chris@909: }
Chris@909: 
Chris@909: function parseStylesheets() {
Chris@909: 	if(!/MSIE (5|6)/.test(navigator.userAgent)) return;
Chris@909: 	window.attachEvent('onunload', unhookHoverEvents);
Chris@909: 	var sheets = doc.styleSheets, l = sheets.length;
Chris@909: 	for(var i=0; i<l; i++) 
Chris@909: 		parseStylesheet(sheets[i]);
Chris@909: }
Chris@909: 	function parseStylesheet(sheet) {
Chris@909: 		if(sheet.imports) {
Chris@909: 			try {
Chris@909: 				var imports = sheet.imports, l = imports.length;
Chris@909: 				for(var i=0; i<l; i++) parseStylesheet(sheet.imports[i]);
Chris@909: 			} catch(securityException){}
Chris@909: 		}
Chris@909: 
Chris@909: 		try {
Chris@909: 			var rules = (currentSheet = sheet).rules, l = rules.length;
Chris@909: 			for(var j=0; j<l; j++) parseCSSRule(rules[j]);
Chris@909: 		} catch(securityException){}
Chris@909: 	}
Chris@909: 
Chris@909: 	function parseCSSRule(rule) {
Chris@909: 		var select = rule.selectorText, style = rule.style.cssText;
Chris@909: 		if(!csshoverReg.test(select) || !style) return;
Chris@909: 
Chris@909: 		var pseudo = select.replace(/[^:]+:([a-z-]+).*/i, 'on$1');
Chris@909: 		var newSelect = select.replace(/(\.([a-z0-9_-]+):[a-z]+)|(:[a-z]+)/gi, '.$2' + pseudo);
Chris@909: 		var className = (/\.([a-z0-9_-]*on(hover|active))/i).exec(newSelect)[1];
Chris@909: 		var affected = select.replace(/:(hover|active).*$/, '');
Chris@909: 		var elements = getElementsBySelect(affected);
Chris@909: 		if(elements.length == 0) return;
Chris@909: 
Chris@909: 		currentSheet.addRule(newSelect, style);
Chris@909: 		for(var i=0; i<elements.length; i++)
Chris@909: 			new HoverElement(elements[i], className, activators[pseudo]);
Chris@909: 	}
Chris@909: 
Chris@909: function HoverElement(node, className, events) {
Chris@909: 	if(!node.hovers) node.hovers = {};
Chris@909: 	if(node.hovers[className]) return;
Chris@909: 	node.hovers[className] = true;
Chris@909: 	hookHoverEvent(node, events.on, function() { node.className += ' ' + className; });
Chris@909: 	hookHoverEvent(node, events.off, function() { node.className = node.className.replace(new RegExp('\\s+'+className, 'g'),''); });
Chris@909: }
Chris@909: 	function hookHoverEvent(node, type, handler) {
Chris@909: 		node.attachEvent(type, handler);
Chris@909: 		hoverEvents[hoverEvents.length] = { 
Chris@909: 			node:node, type:type, handler:handler 
Chris@909: 		};
Chris@909: 	}
Chris@909: 
Chris@909: 	function unhookHoverEvents() {
Chris@909: 		for(var e,i=0; i<hoverEvents.length; i++) {
Chris@909: 			e = hoverEvents[i]; 
Chris@909: 			e.node.detachEvent(e.type, e.handler);
Chris@909: 		}
Chris@909: 	}
Chris@909: 
Chris@909: function getElementsBySelect(rule) {
Chris@909: 	var parts, nodes = [doc];
Chris@909: 	parts = rule.split(' ');
Chris@909: 	for(var i=0; i<parts.length; i++) {
Chris@909: 		nodes = getSelectedNodes(parts[i], nodes);
Chris@909: 	}	return nodes;
Chris@909: }
Chris@909: 	function getSelectedNodes(select, elements) {
Chris@909: 		var result, node, nodes = [];
Chris@909: 		var identify = (/\#([a-z0-9_-]+)/i).exec(select);
Chris@909: 		if(identify) {
Chris@909: 			var element = doc.getElementById(identify[1]);
Chris@909: 			return element? [element]:nodes;
Chris@909: 		}
Chris@909: 		
Chris@909: 		var classname = (/\.([a-z0-9_-]+)/i).exec(select);
Chris@909: 		var tagName = select.replace(/(\.|\#|\:)[a-z0-9_-]+/i, '');
Chris@909: 		var classReg = classname? new RegExp('\\b' + classname[1] + '\\b'):false;
Chris@909: 		for(var i=0; i<elements.length; i++) {
Chris@909: 			result = tagName? elements[i].all.tags(tagName):elements[i].all; 
Chris@909: 			for(var j=0; j<result.length; j++) {
Chris@909: 				node = result[j];
Chris@909: 				if(classReg && !classReg.test(node.className)) continue;
Chris@909: 				nodes[nodes.length] = node;
Chris@909: 			}
Chris@909: 		}	
Chris@909: 		
Chris@909: 		return nodes;
Chris@909: 	}
Chris@909: 
Chris@909: window.parseStylesheets = parseStylesheets;
Chris@909: </script>