function ShortWindow(x,ww,wh){
  var l=(screen.width-ww)/2;
  var h=(screen.height-wh)/2;
  var a=window.open(x,"smallwindow","left="+l+",width="+ww+", height="+wh+",top="+h+", status=no, toolbar=no, menubar=no, resizable=yes, scrollbars=yes");
  a.focus();
  return false;
}

function hideshow(num) {
  var el = document.all['menu' + num];
  if (el.style.display == 'none') {
    el.style.display = '';
  } else {
    el.style.display = 'none';
  }
}