var l=document.getElementById("menu").getElementsByTagName('LI');
	for ( var n=0; n<l.length; n++ )
	{		   
		if ( l[n].getElementsByTagName('UL').length>0 )
		{
			l[n].onmouseover = function()
			{	
				this.getElementsByTagName('UL')[0].style.visibility="visible";
			}	
			l[n].onmouseout = function()	
			{	
				this.getElementsByTagName('UL')[0].style.visibility="hidden";
			}
		}
	}