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;