var over = 'no';
var lastMenu = ' ';
var styleSheetElement;
var oldElement;

function menuOn(currentMenu) {
	over = 'yes';
	if ((browser == 'Netscape') && (version < 5)) {
		if (lastMenu != ' ')  {
			document.images[lastMenu].src = eval(lastMenu + 'Off.src');	
			eval('document.' + lastMenu + 'Menu.visibility = "hidden"');		
		}
		document.images[currentMenu].src = eval(currentMenu + 'On.src');
		eval('document.' + currentMenu + 'Menu.visibility = "visible"');	
		lastMenu = currentMenu;			
	}
	else {
		if (lastMenu != ' ') {
			eval('document.images[lastMenu].src = ' + lastMenu + 'Off.src');
			lastMenu = lastMenu + 'Menu';
			oldElement = document.getElementById(lastMenu);
			oldElement.style.visibility = "hidden";
		}
		eval('document.images[currentMenu].src = ' + currentMenu + 'On.src');
		var layerName = currentMenu + 'Menu';
		styleSheetElement = document.getElementById(layerName);
		styleSheetElement.style.visibility = "visible";
		lastMenu = currentMenu;		
	}

}

function overChecker(currentMenu) {
	over = 'no';
	lastMenu = currentMenu;
	setTimeout("menuOff()", 100);
}

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