var timeout	= 200;
var closetimer	= null;
var ddmenuitem	= 0;

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

	// close old layer
	if(ddmenuitem)
	{
	 ddmenuitem.style.visibility = 'hidden';
	 //ddmenuitem.style.display = 'none';
	 }

	// get new layer and show it
    ddmenuitem = xGetElementById(id);
	ddmenuitem.style.visibility = 'visible';
	//ddmenuitem.style.display = 'inline';

}
// close showed layer
function mclose()
{
	if(ddmenuitem)
	{
        ddmenuitem.style.visibility = 'hidden';
	 //ddmenuitem.style.display = 'none';
	}
}

// go close timer
function mclosetime()
{
    //closetimer = xTimer.set('timeout', null, 'mclose', timeout);
	closetimer = setTimeout('mclose()',timeout);//closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime()
{
	if(closetimer)
	{
		//window.clearTimeout(closetimer);
		clearTimeout(closetimer);
		closetimer = null;
	}
}

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