function setTab(m,n){

 var tli=document.getElementById("menu"+m).getElementsByTagName("li");
 var mli=document.getElementById("main"+m).getElementsByTagName("ul");
 
 for(i=0;i<tli.length;i++){
 
   if(i==n){
     tli[i].className="hover";
    mli[i].style.display="block";
  }else{
      tli[i].className="";
    mli[i].style.display="none";
  }

 }
}