function dropdownmenu()
 {
    var child = $("ul#submenu li ul.submenu")
	
	if (child && child.length > 0)
	{		
		child.parent().hover(
		function(){						
			$("#" + this.id + " ul.submenu").slideDown("slow");
		}
		,
		function(){
			$("#" + this.id + " ul.submenu").slideUp("slow");
		})	
	}
  }

if (window.addEventListener)
window.addEventListener("load", dropdownmenu, false)
else if (window.attachEvent)
window.attachEvent("onload", dropdownmenu)