var menuids=["treemenu1"];

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+"px";
// 		ultags[t].parentNode.getElementsByTagName("a")[0].className="mainfoldericon";
	} else {
		ultags[t].style.left=ultags[t-1].getElementsByTagName("a")[0].offsetWidth+"px";
		//ultags[t].parentNode.getElementsByTagName("a")[0].className="subfoldericon";
	}
	ultags[t].parentNode.onmouseover=function(){
		this.getElementsByTagName("ul")[0].style.visibility="visible";
	}
	ultags[t].parentNode.onmouseout=function(){
		this.getElementsByTagName("ul")[0].style.visibility="hidden";
	}
    }
  }
}

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