function getdiv(id_p)
{
  var div = null;
  if (document.getElementById) { div = document.getElementById(id_p); if(div!=null){div=div.style;} }
  else if (document.layers) { div = eval("document."+id_p); }
  else if (document.all) { div = eval("document."+id_p); if(div!=null){div=div.style;} }
  else { div = null; }
  return div;
}

function close_popup()
{
  if ((div = getdiv("popup")) != null)
  {
    div.visibility = "hidden";
  }
}