// Copyright 2006-2007 javascript-array.com

var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;

// open hidden layer
function mopen(id)
{	
	// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';}

// close showed layer
function mclose()
{ if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';}

// go close timer
function mclosetime()
{ closetimer = window.setTimeout(mclose, timeout);}
	
// cancel close timer
function mcancelclosetime()
{ if(closetimer)
	{window.clearTimeout(closetimer);
		closetimer = null;}
}

// close layer when click-out
document.onclick = mclose;