im = new Array ('menu1', 'menu2', 'menu3', 'menu4', 'menu5', 'menu6', 'menu7', 'menu8', 'menu9', 'menu10', 'menu11');
  img = new Object();
  for (var i=0; i<=11; i++) {
   eval ("img." + im[i] + "=new Image");
   eval ("img." + im[i] + "_=new Image");
   eval ("img." + im[i] + ".src=" + "'images/" + im[i] + ".gif'");
   eval ("img." + im[i] + "_.src=" + "'images/" + im[i] + "_.gif'");
  }

  function ChangeImage(id, action) {
   if (document.images) {
    eval  ("document.images['" + id + "'].src = img." + id + action + ".src;");
   }
  }

  function ClearAll() {
  for (var i=1; i<=11; i++) {
  eval ("document.images['menu"+i+"'].src = img.menu"+i+".src");
  }
}
  function Show(i) {
   eval ("document.images['menu"+i+"'].src = img.menu"+i+"_.src");  
}