function navMouseOver() {
	img = this.firstChild;
	src = img.src.split(".gif");
	newSrc = src[0]+"_on.gif";
	img.src = newSrc;
}

function navMouseOut() {
	img = this.firstChild;
	src = img.src.split("_on.gif");
	newSrc = src[0] +".gif";
	img.src = newSrc;
}

function registerSubnavRollovers() {
	element = document.getElementById('subnavigation');
	if (element) {
		ancs = element.getElementsByTagName("A");
		for (var i=0; i<ancs.length; i++) {
			if (ancs[i].firstChild.tagName && ancs[i].firstChild.tagName.toUpperCase() == "IMG") {
				if (ancs[i].className.indexOf("default") != -1) {
					ancs[i].onmouseover=navMouseOver;
					ancs[i].onmouseout=navMouseOut;
				}
			}

		}
	}
}

function registerResourceRollovers() {
	element = document.getElementById('resource-links');
	if (element) {
		ancs = element.getElementsByTagName("A");
		for (var i=0;i<ancs.length;i++) {
		
			ancs[i].onmouseover=navMouseOver;
			ancs[i].onmouseout=navMouseOut;
				
		}
	}
}

function EventUtils() {
	throw 'RuntimeException: EventUtils is a static utility class';
}

EventUtils.addEventListener = function(target,type,callback,captures) {
	if (target.addEventListener) {
		target.addEventListener(type,callback,captures);
	} else if (target.attachEvent) {
		target.attachEvent('on'+type,callback);
	} else {
		target['on'+type]=callback;
	}
}

EventUtils.hasClass = function(el,className) {
	var re = new RegExp('(?:^|\\s+)' + className + '(?:\\s+|$)');
//	return re.test(el['className']);
return false;
}

matchColumns=function(){ 

     var divs,contDivs,maxHeight,divHeight,d; 
     // get all <div> elements in the document 
     divs=document.getElementsByTagName('div'); 
     contDivs=[]; 
     // initialize maximum height value 
     maxHeight=0; 
     // iterate over all <div> elements in the document 
     for(var i=0;i<divs.length;i++){ 
          // make collection with <div> elements with class attribute 'container' 
          if(/\bcolumn\b/.test(divs[i].className)){ 
                d=divs[i]; 
                contDivs[contDivs.length]=d; 
                // determine height for <div> element 
                if(d.offsetHeight){ 
                     divHeight=d.offsetHeight; 					
                } 
                else if(d.style.pixelHeight){ 
                     divHeight=d.style.pixelHeight;					 
                } 
                // calculate maximum height 
                maxHeight=Math.max(maxHeight,divHeight); 
          } 
     } 
     // assign maximum height value to all of container <div> elements 
     for(var i=0;i<contDivs.length;i++){ 
          contDivs[i].style.height=maxHeight + "px"; 
     } 
}

function registerPhotoLinks() {
	var center=document.getElementById("center-column");
	if (center) {
		ancs = center.getElementsByTagName("A");
		for (var i=0; i<ancs.length; i++){
			if (ancs[i].className.indexOf("photo-link") != -1) {
				ancs[i].onclick=popUp;
				//EventUtils.addEventListener(ancs[i],'click',function() {return popUp();},true);
			}

		}
	}
}

function registerPopupLinks() {
	var col=document.getElementById("right-column");
	if (col) {
		ancs = col.getElementsByTagName("A");
		for (var i=0; i<ancs.length; i++){
			if (ancs[i].className.indexOf("popup-link") != -1) {
				ancs[i].onclick=popUp;
				//EventUtils.addEventListener(ancs[i],'click',function() {return popUp();},true);
			}
			

		}
	}
}

function registerPopups() {
	registerPhotoLinks();
	registerPopupLinks();
}


function popUp() {
	popUpWin = window.open(this.href,"popUp","scrolling=no,status=no,width=700,height=700,resizable=yes");
	popUpWin.focus();
	return false;
}

EventUtils.addEventListener(window,'load',registerResourceRollovers,true);
EventUtils.addEventListener(window,'load',registerSubnavRollovers,true);
EventUtils.addEventListener(window,'load',matchColumns,true);
EventUtils.addEventListener(window,'load',registerPopups,true);


function setMetaTagValue(name, value) {
   var found = 0;
   var metas = document.getElementsByTagName('meta');
   for (i = 0; i < metas.length; i++) {
     if (metas[i].getAttribute('name') == name) {
        metas[i].setAttribute('content',value);
        found = 1;
     }
   }

   if (found == 0) {
     var heads = document.getElementsByTagName('head');
     if (heads.length > 0) {
        var myMeta = document.createElement("meta");
        myMeta.setAttribute('name', name);
        myMeta.setAttribute('content',value);
        heads[0].appendChild(myMeta);
     }
   }
}

function getMetaTagValue(name) {
   var metas = document.getElementsByTagName('meta')
   for (i = 0; i < metas.length; i++) {
     if (metas[i].getAttribute('name') == name) {
        return metas[i].getAttribute('content');
     }
   }
}

// Search Form focus/blur Scripts
var searchTerm = "Search";
function searchLabelRemove( obj ){
	if( obj.value == searchTerm ) obj.value = "";
}
function searchLabelRestore( obj ){
	if( obj.value == "" ) obj.value = searchTerm;
}

/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/	
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};

var rotateSponsor = function() {	
	if (!document.getElementById('sponsorHolder')) return;
	var sponsorlogos = getElementsByClassName('premierSponsor', 'div');
	var random = Math.floor(Math.random() * sponsorlogos.length);
	sponsorlogos[random].style.display = "block";
}

EventUtils.addEventListener(window,'load',rotateSponsor,true);