// JavaScript Document

var timer;
isIE = navigator.appName.indexOf("Internet Explorer") != -1 && parseInt(navigator.appVersion) >= 4;
var submenu1 = "document.all.menu1";
var submenu2 = "document.all.menu2";
var submenu3 = "document.all.menu3";
var submenu3 = "document.all.menu4";

function fireTimer() {
	timer = setTimeout('hideLayer()', 1000);
}

function showLayer(para) {
	
	clearTimeout(timer);

	submenulayer = eval(para);
	
	if (submenulayer == menu1) {
		document.all.menu2.style.visibility = "hidden";
		document.all.menu3.style.visibility = "hidden";
		document.all.menu4.style.visibility = "hidden";
	} else if (submenulayer == menu2) {
		document.all.menu1.style.visibility = "hidden";
		document.all.menu3.style.visibility = "hidden";
		document.all.menu4.style.visibility = "hidden";
	} else if (submenulayer == menu3) {
		document.all.menu1.style.visibility = "hidden";
		document.all.menu2.style.visibility = "hidden";
		document.all.menu4.style.visibility = "hidden";
	} else if (submenulayer == menu4) {
		document.all.menu1.style.visibility = "hidden";
		document.all.menu2.style.visibility = "hidden";
		document.all.menu3.style.visibility = "hidden";
	}

	if (isIE)
	{
		submenulayer.style.visibility = "visible";
	}

}

function hideLayer() {
	
	clearTimeout(timer);

	if (isIE)
	{
		document.all.menu1.style.visibility = "hidden";
		document.all.menu2.style.visibility = "hidden";
		document.all.menu3.style.visibility = "hidden";
		document.all.menu4.style.visibility = "hidden";
	}

}