var pageLoaded = false;

// Main Level Navigation
	tabE7500Off = new Image(); tabE7500Off.src="/a_images/tabs/tab_E7500Off.gif";
	tabE7500On = new Image(); tabE7500On.src="/a_images/tabs/tab_E7500On.gif";	
	tabE7501Off = new Image(); tabE7501Off.src="/a_images/tabs/tab_E7501Off.gif";
	tabE7501On = new Image(); tabE7501On.src="/a_images/tabs/tab_E7501On.gif";
	tabE7505Off = new Image(); tabE7505Off.src="/a_images/tabs/tab_E7505Off.gif";
	tabE7505On = new Image(); tabE7505On.src="/a_images/tabs/tab_E7505On.gif";
	tabi860Off = new Image(); tabi860Off.src="/a_images/tabs/tab_860Off.gif";
	tabi860On = new Image(); tabi860On.src="/a_images/tabs/tab_860On.gif";

	tabGCHEOff = new Image(); tabGCHEOff.src="/a_images/tabs/tab_GCHEOff.gif";
	tabGCHEOn = new Image(); tabGCHEOn.src="/a_images/tabs/tab_GCHEOn.gif";
	tabGCLEOff = new Image(); tabGCLEOff.src="/a_images/tabs/tab_GCLEOff.gif";
	tabGCLEOn = new Image(); tabGCLEOn.src="/a_images/tabs/tab_GCLEOn.gif";
	tabGCSLOff = new Image(); tabGCSLOff.src="/a_images/tabs/tab_GCSLOff.gif";
	tabGCSLOn = new Image(); tabGCSLOn.src="/a_images/tabs/tab_GCSLOn.gif";
	
	tabi875POff = new Image(); tabi875POff.src="/a_images/tabs/tab_875POff.gif";
	tabi875POn = new Image(); tabi875POn.src="/a_images/tabs/tab_875POn.gif";
	tabi865Off = new Image(); tabi865Off.src="/a_images/tabs/tab_865Off.gif";
	tabi865On = new Image(); tabi865On.src="/a_images/tabs/tab_865On.gif";
	tabE7205Off = new Image(); tabE7205Off.src="/a_images/tabs/tab_E7205Off.gif";
	tabE7205On = new Image(); tabE7205On.src="/a_images/tabs/tab_E7205On.gif";
	tabi845Off = new Image(); tabi845Off.src="/a_images/tabs/tab_845Off.gif";
	tabi845On = new Image(); tabi845On.src="/a_images/tabs/tab_845On.gif";

	tabHEOff = new Image(); tabHEOff.src="/a_images/tabs/tab_HEOff.gif";
	tabHEOn = new Image(); tabHEOn.src="/a_images/tabs/tab_HEOn.gif";
	tabLEOff = new Image(); tabLEOff.src="/a_images/tabs/tab_LEOff.gif";
	tabLEOn = new Image(); tabLEOn.src="/a_images/tabs/tab_LEOn.gif";
	tabi815EOff = new Image(); tabi815EOff.src="/a_images/tabs/tab_815EOff.gif";
	tabi815EOn = new Image(); tabi815EOn.src="/a_images/tabs/tab_815EOn.gif";
	tabVIAOff = new Image(); tabVIAOff.src="/a_images/tabs/tab_VIAOff.gif";
	tabVIAOn = new Image(); tabVIAOn.src="/a_images/tabs/tab_VIAOn.gif";
	
	tabXeonOff = new Image(); tabXeonOff.src="/a_images/tabs/tab_XeonOff.gif";
	tabXeonOn = new Image(); tabXeonOn.src="/a_images/tabs/tab_XeonOn.gif";
	tabP4Off = new Image(); tabP4Off.src="/a_images/tabs/tab_P4Off.gif";
	tabP4On = new Image(); tabP4On.src="/a_images/tabs/tab_P4On.gif";
	tabP3Off = new Image(); tabP3Off.src="/a_images/tabs/tab_P3Off.gif";
	tabP3On = new Image(); tabP3On.src="/a_images/tabs/tab_P3On.gif";


function showTabLayer(layername) {
	if (pageLoaded) {
		if (document.all){
			document.all[layername].style.visibility = "visible";
		}
		else if (document.layers){
	 		document.layers[layername].visibility = "visible";
		}
		else {
			var myLayer = document.getElementById(layername);
			myLayer.style.visibility = "visible";
		}
	}
}

function hideLayer(layername) {
	if (pageLoaded) {
		if (document.all){
			document.all[layername].style.visibility = "hidden";
		}
		else if (document.layers){
			document.layers[layername].visibility = "hidden";
		}
		else {
			var myLayer = document.getElementById(layername);
			myLayer.style.visibility = "hidden";
		}
	}
}

var defaultTab = "defaultTab";
var currTabImage = "";
var currTab = "";

function img_tab(img) {
	document[img].src = eval(img + 'On.src')
}

function img_hidetab(img) {
	document[img].src = eval(img + 'Off.src')
}

function showTab(menuname)
{
	resetTab(menuname);
	currTab = menuname;
	showTabLayer(menuname);
	img_tab('tab' + menuname);
	if (!(currTabImage == "") && !(currTabImage == 'tab' + menuname)) {
		img_hidetab(currTabImage);
	}
	currTabImage = "tab" + menuname;
}

function resetTab()
{
	if (currTab != "") {
		hideLayer(currTab);
	}
	showTabLayer(defaultTab);
}