ns4 = (document.layers)? true:false
dom = (document.getElementById)? true : false;
ie4 = (document.all)? true : false;

function preload(imgObj,imgSrc) {
	if (document.images) {
		eval(imgObj+' = new Image()');
		eval(imgObj+'.src = "'+imgSrc+'"');
	}
}

function changeImage(imgName,imgObj,layer) {
	if (document.images) {
		if (document.layers && layer!=null) eval('document.'+layer+'.document.images["'+imgName+'"].src = '+imgObj+'.src');
		else document.images[imgName].src = eval(imgObj+".src");
	}
	return;
}

function changeButton(imgName,imgObj) {
	obj = getObj(imgName);
	obj.src = eval(imgObj+".src");
	return;
}

function swapLocation(){
if (document.map.MapSelector.options[document.map.MapSelector.selectedIndex].value != "") {
	newWin = document.map.MapSelector.options[document.map.MapSelector.selectedIndex].value;
	window.open ('/explore-ca/huells/pop.php?ID='+ newWin,'map','width=416,height=474,toolbars=0,status=0,scrollbars=1,resize=0');
		}
}
				
function popExploreWindow(item) {
	newWin = item;
	window.open ('/explore-ca/huells/pop.php?ID='+ newWin,'map','width=416,height=474,toolbars=0,status=0,scrollbars=1,resize=0');
	return true;
}

function selectASite(){
	selectedSite = document.selectSite.siteID.options[document.selectSite.siteID.selectedIndex].value;
	if (selectedSite != "") {
		//alert(selectedSite);
		document.location.href = selectedSite;
	}
}

function getObj(oID) {
	if (dom)
		return document.getElementById(oID);
	else if (ie4)
		return document.all(oID);
	else if (ns4)
		return null
}

preload('newsletterOff',baseURL + '/media/btn_newsletter.gif');
preload('newsletterOn',baseURL + '/media/btn_newsletter_on.gif');
preload('searchGoOff',baseURL + '/media/btn_search_go.gif');
preload('searchGoOn',baseURL + '/media/btn_search_go-on.gif');