function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImagesArray(array) {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<array.length; i+=2) {
			document[array[i]].src = array[i+1];
		}
	}
}

function changeImages() {
	changeImagesArray(changeImages.arguments);
}

function toggleImages() {
	for (var i=0; i<toggleImages.arguments.length; i+=2) {
		if (selected == toggleImages.arguments[i]) changeImagesArray(toggleImages.arguments[i+1]);
	}
}

var selected = '';
var preloadFlag = false;
function PreLoad() {
	if (document.images) {
		//Top Links
		Home_03_over = newImage("images/Home_03-over.gif");
		Search_05_over = newImage("images/Search_05-over.gif");
		Contact_07_over = newImage("images/Contact_07-over.gif");
		Site_09_over = newImage("images/Site_09-over.gif");
		Privacy_11_over = newImage("images/Privacy_11-over.gif");
		Disclaimer_13_over = newImage("images/Disclaimer_13-over.gif");
		
		//Top Nav Bar
		AboutUs_24_over = newImage("images/AboutUs_24-over.gif");
		Enrollment_25_over = newImage("images/Enrollment_25-over.gif");
		PlanOptions_26_over = newImage("images/PlanOptions_26-over.gif");
		Prescriptions_27_over = newImage("images/Prescriptions_27-over.gif");
		Provider_28_over = newImage("images/ProvDir_28-over.gif");
		Programs_29_over = newImage("images/Programs_29-over.gif");
		Broker_30_over = newImage("images/Broker_30-over.gif");
		Other_31_over = newImage("images/Other_31-over.gif");
		
		SDYourService_34_over = newImage("images/SDYourService_34-over.gif");
				
		preloadFlag = true;
	}
	parseStylesheets();
}

var csshoverReg = /(^|\s)(([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active)/i,
currentSheet, doc = window.document, hoverEvents = [], activators = {
	onhover:{on:'onmouseover', off:'onmouseout'},
	onactive:{on:'onmousedown', off:'onmouseup'}
}

function parseStylesheets() {
	if(!/MSIE (5|6)/.test(navigator.userAgent)) return;
	window.attachEvent('onunload', unhookHoverEvents);
	var sheets = doc.styleSheets, l = sheets.length;
	for(var i=0; i<l; i++) 
		parseStylesheet(sheets[i]);
}

function parseStylesheet(sheet) {
	if(sheet.imports) {
		try {
			var imports = sheet.imports, l = imports.length;
			for(var i=0; i<l; i++) parseStylesheet(sheet.imports[i]);
		} catch(securityException){}
	}

	try {
		var rules = (currentSheet = sheet).rules, l = rules.length;
		for(var j=0; j<l; j++) parseCSSRule(rules[j]);
	} catch(securityException){}
}

function parseCSSRule(rule) {
	var select = rule.selectorText, style = rule.style.cssText;
	if(!csshoverReg.test(select) || !style) return;
	
	var pseudo = select.replace(/[^:]+:([a-z-]+).*/i, 'on$1');
	var newSelect = select.replace(/(\.([a-z0-9_-]+):[a-z]+)|(:[a-z]+)/gi, '.$2' + pseudo);
	var className = (/\.([a-z0-9_-]*on(hover|active))/i).exec(newSelect)[1];
	var affected = select.replace(/:(hover|active).*$/, '');
	var elements = getElementsBySelect(affected);
	if(elements.length == 0) return;

	currentSheet.addRule(newSelect, style);
	for(var i=0; i<elements.length; i++)
		new HoverElement(elements[i], className, activators[pseudo]);
}

function HoverElement(node, className, events) {
	if(!node.hovers) node.hovers = {};
	if(node.hovers[className]) return;
	node.hovers[className] = true;
	hookHoverEvent(node, events.on, function() { node.className += ' ' + className; });
	hookHoverEvent(node, events.off, function() { node.className = node.className.replace(new RegExp('\\s+'+className, 'g'),''); });
}

function hookHoverEvent(node, type, handler) {
	node.attachEvent(type, handler);
	hoverEvents[hoverEvents.length] = { 
		node:node, type:type, handler:handler 
	};
}

function unhookHoverEvents() {
	for(var e,i=0; i<hoverEvents.length; i++) {
		e = hoverEvents[i]; 
		e.node.detachEvent(e.type, e.handler);
	}
}

function getElementsBySelect(rule) {
	var parts, nodes = [doc];
	parts = rule.split(' ');
	for(var i=0; i<parts.length; i++) {
		nodes = getSelectedNodes(parts[i], nodes);
	}	return nodes;
}

function getSelectedNodes(select, elements) {
	var result, node, nodes = [];
	var identify = (/\#([a-z0-9_-]+)/i).exec(select);
	if(identify) return [doc.getElementById(identify[1])];
	
	var classname = (/\.([a-z0-9_-]+)/i).exec(select);
	var tagName = select.replace(/(\.|\#|\:)[a-z0-9_-]+/i, '');
	var classReg = classname? new RegExp('\\b' + classname[1] + '\\b'):false;
	for(var i=0; i<elements.length; i++) {
		result = tagName? elements[i].all.tags(tagName):elements[i].all; 
		for(var j=0; j<result.length; j++) {
			node = result[j];
			if(classReg && !classReg.test(node.className)) continue;
			nodes[nodes.length] = node;
		}
	}	return nodes;
}