function preloadImages(path) {
	var preload = new Image();
	var images = new Array();

	images[0] = path+'/bullet_secondary_selected.gif';
	images[1] = path+'/bullet_tertiary_green_selected.gif';
	images[2] = path+'/bullet_tertiary_green_unselected.gif';
	images[3] = path+'/bullet_tertiary_blue_selected.gif';
	images[4] = path+'/bullet_tertiary_blue_unselected.gif';

	for(var i=0; i < images.length; i++) {
		preload.src = images[i];
	}
}

function imageOver(target) {
	target.src = target.src.replace("_off.","_over.");
}

function imageOut(target) {
	target.src = target.src.replace("_over.","_off.");
}

function secondaryNavHover(target) {
	target.className = target.className+" hover";
}

function secondaryNavUnHover(target) {
	target.className = target.className.substr(0, target.className.indexOf(" "));
}

function tertiaryNavHover(target) {
	target.className = target.className+" hover";
}

function tertiaryNavUnHover(target) {
	target.className = target.className.substr(0, target.className.indexOf(" "));
}

function bookmarkPage(url, title) {
	if (window.sidebar) { // Mozilla Firefox Bookmark
		window.sidebar.addPanel(title, url,"");
	} else if (window.external) { // IE Favorite
		window.external.AddFavorite(url, title);
	} else if(window.opera && window.print) { // Opera Hotlist
		return true;
	}
}

function focusSearch() {
	var searchField = document.getElementById("searchField");
	if(searchField.value == "Search site...") {
		searchField.value = "";
	}
}

function blurSearch() {
	var searchField = document.getElementById("searchField");
	if(searchField.value === "") {
		searchField.value = "Search site...";
	}
}

function setFocus() {
	if(document.getElementById("selectedTertiaryNavItem") !== null)
	{
		document.getElementById("selectedTertiaryNavItem").childNodes[0].focus();
	}
	else if(document.getElementById("selectedSecondaryNavGroup") !== null)
	{
		document.getElementById("selectedSecondaryNavGroup").childNodes[0].childNodes[0].childNodes[0].focus();
	}
	else if(document.getElementById("selectedPrimaryNavItem") !== null)
	{
		document.getElementById("selectedPrimaryNavItem").focus();
	}
}

// An over complicated function to test if an object exists
// the variable name needs to be input as a string
function isset(strVarname)  {
	try
	{
		if(typeof(eval(strVarname)) != "undefined")
		{
			return true;
		}

		else
		{
			return false;
		}
	}
	catch(e)
	{
		return false;
	}
}