// Define global variables
var timerID = null;
var timerOn = false;
var timecount = 500;
var what = null;
var newbrowser = true;
var check = false;

// Initializing, used in page body
function init() {
	if (document.layers) { // Netscape 4
		layerRef="document.layers";
		styleSwitch="";
		visibleVar="show";
		screenSize = window.innerWidth;
		what ="ns4";
	} else if (document.all) { // IE
		layerRef="document.all";
		styleSwitch=".style";
		visibleVar="visible";
		screenSize = document.body.clientWidth + 18;
		what ="ie";
	} else if (document.getElementById) { // Netscape 6
		layerRef="document.getElementByID";
		styleSwitch=".style";
		visibleVar="visible";
		what="moz";
	} else { // Older than 4.0 browser.
		what="none";
		newbrowser = false;
	}
		  
	check = true;
}

// Turns the layers on and off
function show(layerName) {
	if (check) {
		if (what =="none") {
			return;
		} else if (what == "moz") {
			document.getElementById(layerName).style.display="block";
		} else {
			//eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="visible"');
			eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.display="block"');
		}
	}
}

// Hide a layer
function hideLayer(layerName){
	if (check) {
		if (what =="none") {
			return;
		} else if (what == "moz") {
			document.getElementById(layerName).style.display="none";
		} else {
			//eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.visibility="hidden"');
			eval(layerRef+'["'+layerName+'"]'+styleSwitch+'.display="none"');
		}
	}
}