var loadEvents = new Array();

function addLoadEvent(whichFunction) { 
	if (window.onload) { 
		if (window.onload != callLoadEvents) { 
			loadEvents[0] = window.onload;
			window.onload = callLoadEvents;	}		
		loadEvents[loadEvents.length] = whichFunction; }
	else { 
		window.onload = whichFunction; } }
function callLoadEvents() {
	for (var i = 0; i < loadEvents.length; i++) { 
		loadEvents[i](); } }

function navSwap() {
	if (this.src.indexOf('Active.jpg') != -1) {
		this.src = this.src.substring(0, this.src.length - 10) + '.jpg'; }
	else {
		this.src = this.src.substring(0, this.src.length - 4) + 'Active.jpg'; } }
		
function setNavSwap() {

	var arrNav = document.getElementById('primeNav').getElementsByTagName('img');
	var arrPreLoad = new Array(); 
	for (var iVar = 0; iVar < arrNav.length; iVar ++) { 
		arrPreLoad[iVar] = new Image(); 
		arrPreLoad[iVar].src = arrNav[iVar].src.substring(0, arrNav[iVar].src.length - 4) + 'Active.jpg';
		arrNav[iVar].onmouseover = navSwap;
		arrNav[iVar].onfocus = navSwap;
		arrNav[iVar].onmouseout = navSwap;
		arrNav[iVar].onblur = navSwap; 
	} 

}
addLoadEvent(setNavSwap);