var el=new Array();

function menuon(n)  {
  if (document.layers) { el[n]=document.layers["menu"+n]; } else { el[n]=document.getElementById("menu"+n).style; }
  el[n].visibility="visible";
}

function menuoff(n) {
  if (document.layers) { el[n]=document.layers["menu"+n]; } else { el[n]=document.getElementById("menu"+n).style; }
  el[n].visibility="hidden";
}