var platform = navigator.platform.substr(0,3);
var browser = navigator.appName;
var version = navigator.appVersion.substr(0,1);
var over = 'no'
var lastMenu = ' '
var sSElement;
var oldElement;
function menuOn (currentMenu) {
	over = 'yes';
	if ((browser == 'Netscape') && (version < 5)) {
		if (lastMenu != ' ') {
		eval('document.' + lastMenu + 'Menu.visibility = "hidden"');
		}
		eval('document.' + currentMenu + 'Menu.visibility = "visible"');
		lastMenu = currentMenu;
	}
	else {
		if (lastMenu != ' ') {
			lastMenu = lastMenu + 'Menu';
			oldElement = document.getElementById(lastMenu);
			oldElement.style.visibility = "hidden";
		}
		var layerName = currentMenu + 'Menu';
		sSElement = document.getElementById(layerName);
		sSElement.style.visibility = "visible";
		lastMenu = currentMenu;
	}
}

function timeR(currentMenu)  {
	over = 'no';
	lastMenu = currentMenu;
	setTimeout("menuOff()", 300);
}

function menuOff() {
	if (over == 'no') {
		if ((browser == 'Netscape') && (version <5)) {
			eval('document.' + lastMenu + 'Menu.visibility = "hidden"');
		}
		else {
			sSElement.style.visibility = 'hidden';
		}
	}
}