// JavaScript Document
<!--
var timeout         = 500;
var closetimer		= 30;
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; 
// -->