// JavaScript Document

// Copyright 2006-2007 javascript-array.com

var timeout	= 500;
var closetimer	= 0;
var menu	= 0;

// open hidden layer
function openDropdown(menuToOpen)
{	
	if (document.getElementById(menuToOpen) != null)
	{
		// cancel close timer
		cancelCloseTimer();
	
		// close old layer
		if(menu) menu.style.visibility = 'hidden';
	
		// get new layer and show it
		menu = document.getElementById(menuToOpen);
		menu.style.visibility = 'visible';
		menu.style.zIndex = "1000";
	}
}
// close showed layer
function closeDropdown()
{
	if(menu) menu.style.visibility = 'hidden';
}

// go close timer
function setCloseTimer()
{
	closetimer = window.setTimeout(closeDropdown, timeout);
}

// cancel close timer
function cancelCloseTimer()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}