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

// 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 ShowSubMenu(id)
{
	document.getElementById(id).style.left="130px";
	document.getElementById(id).style.top="144px";
	document.getElementById(id).style.display="block";
	document.getElementById(id).style.visibility="visible";
}

function HideSubMenu(id)
{
	document.getElementById(id).style.display="none";
	document.getElementById(id).style.visibility="hidden";
}

document.onclick = mclose;