// Copyright 2006-2007 javascript-array.com

var timeout	= 200;
var closetimer	= 0;
var ddmenuitem	= 0;
var oldLink = 0;
var pathNormal = 'images/nav-bg.gif';
var pathHover = 'images/nav-bg-over.gif';

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

	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	//set old link to normal
	if(oldLink) oldLink.style.background = 'url('+pathNormal+')';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
	
	//set new link background to 'over' state
	newLink.style.background = 'url('+pathHover+')';
	//new link becomes old
	oldLink = newLink;

}
// close showed layer
function mclose()
{
	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	//set old link to normal
	if(oldLink) oldLink.style.background = 'url('+pathNormal+')';
}

// 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;