function preloadAnimalCards()
{
      image1 = new Image();
      image1.src = "imgs/card_deer.gif";

      image2 = new Image();
      image2.src = "imgs/card_elephant.gif";

      image3 = new Image();
      image3.src = "imgs/card_hummingbird.gif";

      image4 = new Image();
      image4.src = "imgs/card_monkey.gif";

      image5 = new Image();
      image5.src = "imgs/card_horse.gif";

      image6 = new Image();
      image6.src = "imgs/card_bear.gif";

      image7 = new Image();
      image7.src = "imgs/card_wolf.gif";

      image8 = new Image();
      image8.src = "imgs/card_rabbit.gif";

      image9 = new Image();
      image9.src = "imgs/card_squirrel.gif";

      image10 = new Image();
      image10.src = "imgs/card_frog.gif";	

      image11 = new Image();
      image11.src = "imgs/card_swan.gif";

      image12 = new Image();
      image12.src = "imgs/card_lion.gif";
}