// Copyright 2010 appliquesoft.com

var item	= 0;
var timeout	= 500;
var closetimer	= 0;
//close the open menu
function menuClose()
{
	if(item)
	{
		 item.style.visibility = 'hidden';
	}
}
//open a drop down menu
function menuOpen(menuId)
{	
	menuCancelClosetime();
	// check if any old layer is available, if availabe then colse it
	if(item)
	{
		item.style.visibility = 'hidden';
	}
	// we need to get a new menu layer to open menuId
	item = document.getElementById(menuId);
	item.style.visibility = 'visible';
}

// set timeout
function menuClosetime()
{
	closetimer = window.setTimeout(menuClose, timeout);
}

// cancel close timer
function menuCancelClosetime()
{
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}
// close the drop down menu when click-out anywhere in the page