if (document.getElementById) {
    document.write ("<style type='text/css'>");
    document.write (".submenu {display:none;}");
    document.write ("</style>");
    document.write ("<style type='text/css'>");
    document.write (".submenu_open {display:block;}");
    document.write ("</style>");
  }

function MenuOn(x) {
  obj=document.getElementById("submenu"+x).style.visibility = "visible";
}

function MenuOff(x) {
  obj=document.getElementById("submenu"+x).style.visibility = "hidden";
}

function resetMenu(obj) {
  if(document.getElementById) {
    var el = document.getElementById(obj);
    var ek = document.getElementById('m'+obj);

    ek.className = ek.className == "menuD" ? "menuM" : "menuD";

    if(ek.className == "menuD") {
      el.style.display = "none";
    } else {
      el.style.display = "block";
    }
  }
}