function showmenu(id){
var ulobj=document.getElementById(id);
var ulist=ulobj.getElementsByTagName("li");
for (var x=0; x<ulist.length; x++){ 
ulist[x].onclick = function () { 
for (var x=0; x<ulist.length; x++){
ulist[x].getElementsByTagName("a")[0].className="";
document.getElementById("t"+x).style.display="none";
} 
this.getElementsByTagName("a")[0].className="selected" ;
uid=this.getElementsByTagName("a")[0].getAttribute("rel");
document.getElementById(uid).style.display="block";
}
}}