var timeout	= 0;
var closetimer	= 0;
var ddmenuitem	= 0;
var origmenuitem;
var t2;

// open hidden layer
function mopen(id,oTd)
{	
	// cancel close timer
	mcancelclosetime();
	origmenuitem = oTd;
	
	// close old layer
	if(ddmenuitem) ddmenuitem.style.display = 'none';
	t2 = new Tween(document.getElementById(id).style,'top',Tween.regularEaseIn,105,135,.2,'px');
	t2.start();
	
	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.display = 'block';
	
	origmenuitem.style.backgroundColor = "#3a3f43";
}
// close showed layer
function mclose()
{
	if(t2) {
		t2.rewind();
	}
	
	if(origmenuitem)origmenuitem.style.backgroundColor = "";
}

// 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;