// Copyright 2006-2007 javascript-array.com
var timeout	= 2000;
var closetimer = 0;
var ddmenuitem = 0;
var ddmenuimg	= 0;
var ddmenuimg_orig	= '';
// 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('nav_'+id);
	ddmenuitem.style.visibility = 'visible';
	//ddmenuimg.src = '/images/topnav_donate.jpg';
}
// close shown layer
function mclose() {
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}
// go close timer
function mclosetime() {
	closetimer = window.setTimeout(mclose, timeout);
}
// go reset timer
function mclosereset() {
	mcancelclosetime();
	mclosetime();
}
// cancel close timer
function mcancelclosetime() {
	if(closetimer)	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}
// close layer when click-out
document.onclick = mclose;