// Copyright 2006-2007 javascript-array.com

var timecount	= 2000;
var closetimer	= 0;
var ddmenuitem	= 0;
var timerID = null;
var timerOn = false;

// 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;
	}
}
					  
	function startTime() {
		if (timerOn == false) {
			timerID = setTimeout("mclose()",timecount);
			timerOn = true;
		}
	}
	function stopTime() {
		if (timerOn) {
			clearTimeout(timerID);
			timerID = "null";
			timerOn = "false";
		}
	}
	function roll(img_name, img_src)
   {
   document[img_name].src = img_src;
   }

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