home_img1_out = new Image();
  home_img1_out.src = "images/home_link_appointment_off.jpg";

  home_img1_over = new Image();
  home_img1_over.src = "images/home_link_appointment_on.jpg";

  home_img2_out = new Image();
  home_img2_out.src = "images/home_link_events_off.jpg";

  home_img2_over = new Image();
  home_img2_over.src = "images/home_link_events_on.jpg";


  function display(imgName, imgUrl) {
    if (document.images && typeof imgUrl != 'undefined')
      document[imgName].src = imgUrl.src;
  }