var timeout         = 500;
		var closetimer		= 0;
		var ddmenuitem      = 0;
		function mopen(id)
		{	
			mcancelclosetime();
			if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
			ddmenuitem = document.getElementById(id);
			ddmenuitem.style.visibility = 'visible';

		}
		function mclose()
		{
			if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
		}
		function mclosetime()
		{
			closetimer = window.setTimeout(mclose, timeout);
		}
		function mcancelclosetime()
		{
			if(closetimer)
			{
				window.clearTimeout(closetimer);
				closetimer = null;
			}
		}
		document.onclick = mclose;