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";
    }
  }
}