// Copyright 2006-2007 javascript-array.com
var timeout	= 250;
var closetimer	= 0;
var ddmenuitem	= 0;
function mopen(id) { // open hidden layer
	// 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';
}
function mclose() { // close showed layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}
function mclosetime() { // go close timer
	closetimer = window.setTimeout(mclose, timeout);
}
function mcancelclosetime() { // cancel close timer
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}
document.onclick = mclose; // close layer when click-out