var menuids=["menu"];

 function buildsubmenus_horizontal(){
 	for (var i=0; i<menuids.length; i++){
 		var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul")
 		for (var t=0; t<ultags.length; t++){
 			if (ultags[t].parentNode.parentNode.id==menuids[i]){
 				ultags[t].style.top=ultags[t].parentNode.offsetHeight-1+"px"
 			}
 			else{
 				ultags[t].style.left=ultags[t-1].getElementsByTagName("a")[0].offsetWidth-20+"px"
 			}
 			ultags[t].parentNode.onmouseover=function(){
 				this.getElementsByTagName("ul")[0].style.visibility="visible";
 				this.firstChild.className="active"
 			}
 			ultags[t].parentNode.onmouseout=function(){
 				this.getElementsByTagName("ul")[0].style.visibility="hidden";
 				this.firstChild.className=""
 			}
 		}
 	}
 }

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