if( navigator.appVersion.charAt(0) >= "3" ){
      upy = new Image(); upy.src = "../Menus/y-up.gif";
      upb = new Image(); upb.src = "../Menus/b-up.gif";

      overy = new Image(); overy.src = "../Menus/y-over.gif";
      overb = new Image(); overb.src = "../Menus/b-over.gif";
    }

    function mchg( id, fname ) {
      if( navigator.appVersion.charAt(0) >= "3" ){
        document.images[id].src = eval(fname + ".src");
      }
    }