// retrieves all links contained within navcontainer li tags and sets a css style to the active link...
// active link is determined by checking what page we are currently on and comparing it to the links...
window.onload = function(){
	HighlightSideNavigation();
	HighlightMainNavigation();
	parseStylesheets();
}
	

function clearActive(objElement){
	var level1 = objElement.parentNode.parentNode.parentNode;
	var subMenu = objElement.parentNode.parentNode;
	if(level1){
		//alert(subMenu.className)
		clearAllClasses(level1, subMenu)
	}
}

function clearAllClasses(oElement, subMenu){
	var tempClassName = ""
	var skip = false
	try{
		if(oElement){
			if (oElement.className){
				if ((oElement != subMenu)){
					oElement.className = oElement.className.replace("active2 ", "");
					oElement.className = oElement.className.replace("active2", "");
				}
			}
			
			for(var i = 0; i < oElement.childNodes.length; i++){
				clearAllClasses(oElement.childNodes[i], subMenu)
			}
		}
	}catch(err){

	}
}

// not currently being used...
function resetActive(objElement){
	//alert(objElement.parentNode.parentNode.class)
}


function HighlightSideNavigation(){
	if (document.getElementById("navcontainer") != null){
		var list = document.getElementById("navcontainer").getElementsByTagName("li");
		if (list != null){
			for(var i = 0;i < list.length;i++){
				var aList = list[i].getElementsByTagName("a");
				for(var k = 0;k < aList.length;k++){
					//alert(location.href)
					if (location.href.toLowerCase() == aList[k].href.toLowerCase()){
						aList[k].className = "navLinksActive"
					}
				}
			}
		}
	}
}

function HighlightMainNavigation(){
	if (document.getElementById("MainSiteNav") != null){
		var list = document.getElementById("MainSiteNav").getElementsByTagName("li");
		var linkFound = false;
		var temp = ""
		var objParentNode;
		var objChildNode;
		var sLevel;
		if (list != null){
			for(var i = 0;i < list.length;i++){
				var aList = list[i].getElementsByTagName("a");
				for(var k = 0;k < aList.length;k++){
					if (location.href.toLowerCase() == aList[k].href.toLowerCase()){
						sLevel = aList[k].parentNode.parentNode.parentNode.className.toLowerCase();
						switch(sLevel){
							case "level1":
								aList[k].parentNode.className = aList[k].parentNode.className + "active1"
								aList[k].parentNode.parentNode.className = aList[k].parentNode.parentNode.className + " active1"
								break;
							case "level2":
							case "level2 reposition":							
								objParentNode = aList[k].parentNode.parentNode.parentNode.parentNode
								objChildNode = objParentNode.childNodes[0]
								objParentNode.className = objParentNode.className + " active1"
								objChildNode.className = objChildNode.className + " active1"
								
								temp = "";
								temp = aList[k].parentNode.className
								temp=(temp=="")? "active2" + temp:"active2 " + temp;
								aList[k].parentNode.className = temp

								//alert(aList[k].parentNode.parentNode.nodeName)								
								temp = "";
								temp = aList[k].parentNode.parentNode.className
								temp=(temp=="")? "active2" + temp:"active2 " + temp;
								aList[k].parentNode.parentNode.className = temp
								
								temp = "";
								temp = aList[k].parentNode.parentNode.parentNode.className
								temp=(temp=="")? "active2" + temp:"active2 " + temp;
								aList[k].parentNode.parentNode.parentNode.className = temp
								
								//alert(aList[k].parentNode.className)
								//alert(aList[k].parentNode.parentNode.className)
								//alert(aList[k].parentNode.parentNode.parentNode.className)
								break;
							case "level3":
								objParentNode = aList[k].parentNode.parentNode.parentNode.parentNode.parentNode.parentNode
								objChildNode = objParentNode.childNodes[0]
															
								objParentNode.className = objParentNode.className + " active1"
								objChildNode.className = objChildNode.className + "active1"
	
								//greeting=(visitor=="PRES")?"Dear President ":"Dear " 
								temp = "";
								temp = aList[k].parentNode.parentNode.parentNode.parentNode.childNodes[0].className
								temp=(temp=="")? "active2" + temp:"active2 " + temp;																													
								aList[k].parentNode.parentNode.parentNode.parentNode.childNodes[0].className =  temp
								//alert(temp)
						
								temp = "";
								temp = aList[k].parentNode.parentNode.parentNode.parentNode.className
								temp=(temp=="")? "active2" + temp:"active2 " + temp;
								aList[k].parentNode.parentNode.parentNode.parentNode.className = temp
								//alert(temp)
								
								temp = "";
								temp = aList[k].parentNode.parentNode.parentNode.parentNode.parentNode.className
								temp=(temp=="")? "active2" + temp:"active2 " + temp;	
								aList[k].parentNode.parentNode.parentNode.parentNode.parentNode.className = temp
								//alert(temp)
								/************************************************************************************/
								
								temp = "";
								temp = aList[k].parentNode.className
								temp=(temp=="")? "active2" + temp:"active2 " + temp;	
								aList[k].parentNode.className = temp
								temp = "";
								
								temp = aList[k].parentNode.parentNode.className
								temp=(temp=="")? "active2" + temp:"active2 " + temp;	
								aList[k].parentNode.parentNode.className = temp
								temp = "";
								break;
							default:
					
								break;					
						}
						
						var linkFound = true;
						break;
					}
				}
				
				if (linkFound){
					// we found the active link so break out of our loop...
					linkFound = false;
					break;
				}
			}
		}
	}
}



// used for IE6...
var csshoverReg = /(^|\s)((([^a]([^ ]+)?)|(a([^#.][^ ]+)+)):(hover|active))|((a|input|textarea)([#.][^ ]+)?:unknown)/i,
currentSheet, doc = window.document, hoverEvents = [], activators = {
	onhover:{on:'onmouseover', off:'onmouseout'},
	onactive:{on:'onmousedown', off:'onmouseup'},
	onunknown:{on:'onfocus', off:'onblur'}
}

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, '.$2' + pseudo);
		var className = (/\.([a-z0-9_-]*on(hover|active|unknown))/i).exec(newSelect)[1];
		var affected = select.replace(/:(hover|active|unknown).*$/, '');
		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) {
			var element = doc.getElementById(identify[1]);
			return element? [element]:nodes;
		}
		
		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;
	}