function OpenMenu(id) {
  if (document.getElementById) {
    document.getElementById(id).style.display="block";
  } else if (document.all) {
    document.all[id].style.display="block";
  } else if (document.layers) {
    document.layers[id].display="block";
  }
}

function CloseMenu(id) {
  if (document.getElementById) {
    document.getElementById(id).style.display="none";
  } else if (document.all) {
    document.all[id].style.display="none";
  } else if (document.layers) {
    document.layers[id].display="none";
  }
}