var timeout = 250;
var closetimer = 0;
var ddmenuitem = 0;

// open hidden layer
function mopen(id)
{
	// cancel close timer
	mcancelclosetime();
	
	// close old layer
	if(ddmenuitem) 
		//ddmenuitem.style.display = "none";
		ddmenuitem.style.visibility = "hidden";
	
	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	
	//ddmenuitem.style.display= "block";
	//$(ddmenuitem).blindDown();
	
	ddmenuitem.style.visibility = "visible"
	
}

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

//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;