ImageList = new Array ();
  for (i in ImageNames) {
    ImageList[i] = new Image();
    ImageList[i].src = "/" + lang + "/images/menu/" + ImageNames[i] + "_on.gif";
  }

  function imgSwap(Name,postfix) {
    document.images[Name].src = '/' + lang + '/images/menu/' + Name + '_' + postfix + '.gif';
}