var ie = navigator.appName == "Microsoft Internet Explorer";
var op = navigator.userAgent.indexOf('Opera') != -1;
var ns6 = navigator.appName == "Netscape" && navigator.appVersion.substring(0,1) > "4";
var timer = null;

// Closes all Layers
function Close() {
	
	if (ie) {
		eval ('document.all.menu' + 2 + '.style.visibility = "hidden"');
		eval ('document.all.menu' + 3 + '.style.visibility = "hidden"');
		eval ('document.all.menu' + 4 + '.style.visibility = "hidden"');
	}
	if (ns6 || op) {
		document.getElementsByName("menu" + 2)[0].style.visibility = "hidden";	
		document.getElementsByName("menu" + 3)[0].style.visibility = "hidden";	
		document.getElementsByName("menu" + 4)[0].style.visibility = "hidden";	
	}
}
// open menu x
function OpenMenu (x) {
	Close();

	if (ie)  {
		showmenu = eval ("document.all.menu" +x);
		showmenu.style.visibility = "visible";
	}

	if (ns6 || op) {
		showmenu = document.getElementsByName ("menu"+x)[0];
		showmenu.style.visibility = "visible";
	}
}