if (document.getElementById){ 
  document.write('<style type="text/css">\n')
  document.write('.submenu{display: none;}\n')
  document.write('</style>\n')
  }
  
  function SwitchMenu(obj){
   if(document.getElementById){
   var el = document.getElementById(obj);
   var ar = document.getElementById("masterdiv").getElementsByTagName("span");
    if(el.style.display != "block"){ 
     for (var i=0; i<ar.length; i++){
      if (ar[i].className=="submenu")
      ar[i].style.display = "none";
     }
     el.style.display = "block";
    }else{
     el.style.display = "none";
    }
   }
  }