var cssmenuids=["menu_ui"] 
var csssubmenuoffset=-1 //Offset of submenus from main menu. Default is 0 pixels.

function createMenu(){
for (var i=0; i<cssmenuids.length; i++){
  var ultags=document.getElementById(cssmenuids[i]).getElementsByTagName("ul")
    for (var t=0; t<ultags.length; t++){
		ultags[t].style.top=ultags[t].parentNode.offsetHeight+csssubmenuoffset+"px";
		ultags[t].parentNode.onmouseover=function(){
					this.style.zIndex=100;
    	this.getElementsByTagName("ul")[0].style.visibility="visible";
					this.getElementsByTagName("ul")[0].style.zIndex=0;
    	}
    	ultags[t].parentNode.onmouseout=function(){
					this.style.zIndex=0;
					this.getElementsByTagName("ul")[0].style.visibility="hidden";
					this.getElementsByTagName("ul")[0].style.zIndex=100;
    	}
    }
  }
}

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