if (document.images) {
 
  /* rollovers for the cast nav */
  
  var btn_video1_off = new Image();
  btn_video1_off.src = "/specials/911/images/btn_video1_off.jpg";
  var btn_video1_on = new Image();
  btn_video1_on.src = "/specials/911/images/btn_video1_on.jpg";
  
  var btn_video2_off = new Image();
  btn_video2_off.src = "/specials/911/images/btn_video2_off.jpg";
  var btn_video2_on = new Image();
  btn_video2_on.src = "/specials/911/images/btn_video2_on.jpg";
  
  var btn_video3_off = new Image();
  btn_video3_off.src = "/specials/911/images/btn_video3_off.jpg";
  var btn_video3_on = new Image();
  btn_video3_on.src = "/specials/911/images/btn_video3_on.jpg";
  
  var btn_video4_off = new Image();
  btn_video4_off.src = "/specials/911/images/btn_video4_off.jpg";
  var btn_video4_on = new Image();
  btn_video4_on.src = "/specials/911/images/btn_video4_on.jpg";
  
  var btn_video5_off = new Image();
  btn_video5_off.src = "/specials/911/images/btn_video5_off.jpg";
  var btn_video5_on = new Image();
  btn_video5_on.src = "/specials/911/images/btn_video5_on.jpg";
  
  var btn_video6_off = new Image();
  btn_video6_off.src = "/specials/911/images/btn_video6_off.jpg";
  var btn_video6_on = new Image();
  btn_video6_on.src = "/specials/911/images/btn_video6_on.jpg";
  
  var btn_video7_off = new Image();
  btn_video7_off.src = "/specials/911/images/btn_video7_off.jpg";
  var btn_video7_on = new Image();
  btn_video7_on.src = "/specials/911/images/btn_video7_on.jpg";
  
  var btn_video8_off = new Image();
  btn_video8_off.src = "/specials/911/images/btn_video8_off.jpg";
  var btn_video8_on = new Image();
  btn_video8_on.src = "/specials/911/images/btn_video8_on.jpg";
  
  var btn_video9_off = new Image();
  btn_video9_off.src = "/specials/911/images/btn_video9_off.jpg";
  var btn_video9_on = new Image();
  btn_video9_on.src = "/specials/911/images/btn_video9_on.jpg";
  
  var btn_video10_off = new Image();
  btn_video10_off.src = "/specials/911/images/btn_video10_off.jpg";
  var btn_video10_on = new Image();
  btn_video10_on.src = "/specials/911/images/btn_video10_on.jpg";
  
  var btn_video11_off = new Image();
  btn_video11_off.src = "/specials/911/images/btn_video11_off.jpg";
  var btn_video11_on = new Image();
  btn_video11_on.src = "/specials/911/images/btn_video11_on.jpg";
  
  var btn_video12_off = new Image();
  btn_video12_off.src = "/specials/911/images/btn_video12_off.jpg";
  var btn_video12_on = new Image();
  btn_video12_on.src = "/specials/911/images/btn_video12_on.jpg";
  
  var btn_video13_off = new Image();
  btn_video13_off.src = "/specials/911/images/btn_video13_off.jpg";
  var btn_video13_on = new Image();
  btn_video13_on.src = "/specials/911/images/btn_video13_on.jpg";
  
  var btn_video14_off = new Image();
  btn_video14_off.src = "/specials/911/images/btn_video14_off.jpg";
  var btn_video14_on = new Image();
  btn_video14_on.src = "/specials/911/images/btn_video14_on.jpg";
  
  var btn_video15_off = new Image();
  btn_video15_off.src = "/specials/911/images/btn_video15_off.jpg";
  var btn_video15_on = new Image();
  btn_video15_on.src = "/specials/911/images/btn_video15_on.jpg";
  
  var btn_video16_off = new Image();
  btn_video16_off.src = "/specials/911/images/btn_video16_off.jpg";
  var btn_video16_on = new Image();
  btn_video16_on.src = "/specials/911/images/btn_video16_on.jpg";
  
  var btn_video17_off = new Image();
  btn_video17_off.src = "/specials/911/images/btn_video17_off.jpg";
  var btn_video17_on = new Image();
  btn_video17_on.src = "/specials/911/images/btn_video17_on.jpg";
  
  var btn_video18_off = new Image();
  btn_video18_off.src = "/specials/911/images/btn_video18_off.jpg";
  var btn_video18_on = new Image();
  btn_video18_on.src = "/specials/911/images/btn_video18_on.jpg";
  
  var btn_video19_off = new Image();
  btn_video19_off.src = "/specials/911/images/btn_video19_off.jpg";
  var btn_video19_on = new Image();
  btn_video19_on.src = "/specials/911/images/btn_video19_on.jpg";
}

function onbutton(imgName) {
  if (document.images)
    document.images[imgName].src = eval(imgName + "_on.src");
}

function offbutton(imgName) {
  if (document.images)
    document.images[imgName].src = eval(imgName + "_off.src");
}