function img(img){
	if (document.images) {
      image1_on = new Image();
      image1_on.src = img + "/button_guilds_on.jpg";
      image2_on = new Image();
      image2_on.src = img + "/button_ranking_on.jpg";
      image3_on = new Image();
      image3_on.src = img + "/button_forum_on.jpg";

      image1_off = new Image();
      image1_off.src = img + "/button_guilds_off.jpg";
      image2_off = new Image();
      image2_off.src = img + "/button_ranking_off.jpg";
      image3_off = new Image();
      image3_off.src = img + "/button_forum_off.jpg";
      }
}
   function turnOn(imageName) {
      document[imageName].src = eval(imageName + "_on.src");
   }

   function turnOff(imageName) {
         document[imageName].src = eval(imageName + "_off.src");
   }