if (document.images) {
  image1on = new Image();
  image1on.src = "/.pliki/img_menu1/menu1on.gif";

  image2on = new Image();
  image2on.src = "/.pliki/img_menu1/menu2on.gif";

  image3on = new Image();
  image3on.src = "/.pliki/img_menu1/menu3on.gif";

  image4on = new Image();
  image4on.src = "/.pliki/img_menu1/menu4on.gif";

  image5on = new Image();
  image5on.src = "/.pliki/img_menu1/menu5on.gif";

  image6on = new Image();
  image6on.src = "/.pliki/img_menu1/menu6on.gif";

  image7on = new Image();
  image7on.src = "/.pliki/img_menu1/menu7on.gif";

  image8on = new Image();
  image8on.src = "/.pliki/img_menu1/menu8on.gif";

  image9on = new Image();
  image9on.src = "/.pliki/img_menu1/menu9on.gif";

  image10on = new Image();
  image10on.src = "/.pliki/img_menu1/menu10on.gif";
  
  image11on = new Image();
  image11on.src = "/.pliki/img_menu1/menu11on.gif";

  image12on = new Image();
  image12on.src = "/.pliki/img_menu1/menu12on.gif";

  image1off = new Image();
  image1off.src = "/.pliki/img_menu1/menu1off.gif";

  image2off = new Image();
  image2off.src = "/.pliki/img_menu1/menu2off.gif";

  image3off = new Image();
  image3off.src = "/.pliki/img_menu1/menu3off.gif";

  image4off = new Image();
  image4off.src = "/.pliki/img_menu1/menu4off.gif";

  image5off = new Image();
  image5off.src = "/.pliki/img_menu1/menu5off.gif";

  image6off = new Image();
  image6off.src = "/.pliki/img_menu1/menu6off.gif";

  image7off = new Image();
  image7off.src = "/.pliki/img_menu1/menu7off.gif";

  image8off = new Image();
  image8off.src = "/.pliki/img_menu1/menu8off.gif";

  image9off = new Image();
  image9off.src = "/.pliki/img_menu1/menu9off.gif";

  image10off = new Image();
  image10off.src = "/.pliki/img_menu1/menu10off.gif";
  
  image11off = new Image();
  image11off.src = "/.pliki/img_menu1/menu11off.gif";

  image12off = new Image();
  image12off.src = "/.pliki/img_menu1/menu12off.gif";
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval
      (changeImages.arguments[i+1] + ".src");
    }
  }
}