function showMenu(x) {
  if (document.getElementById)
    document.getElementById(x).style.visibility = "visible";
    document.getElementById(x+"Level1").style.backgroundColor = "#FFECA6";
}

function hideMenu(x) {
  if (document.getElementById)
    document.getElementById(x).style.visibility = "hidden";
    document.getElementById(x+"Level1").style.backgroundColor = "transparent";
}