var timeout	= 500;
	var closetimer	= 0;
	var menuitem	= 0;
	
	function mopen(id)
	{	
		mcancelclosetime();
		if(menuitem) menuitem.style.display = 'none';
		menuitem = document.getElementById(id);
		menuitem.style.display = 'block';
	
	}
	function mclose()
	{
		if(menuitem) menuitem.style.display = 'none';
	}
	function mclosetime()
	{
		closetimer = window.setTimeout(mclose, timeout);
	}
	
	function mcancelclosetime()
	{
		if(closetimer)
		{
			window.clearTimeout(closetimer);
			closetimer = null;
		}
	}
	document.onclick = mclose;