browser = 
    (((navigator.appName == "Netscape") && 
     (parseInt(navigator.appVersion) >= 3 )) || 
    ((navigator.appName == "Microsoft Internet Explorer") && 
     (parseInt(navigator.appVersion) >= 4 )))

browser == true;
if (browser){
  bu1_on = new Image();
  bu1_on.src = "images/drop-down-menu/bu1_on.gif";
  bu1_out = new Image();
  bu1_out.src = "images/drop-down-menu/bu1_off.gif";

  bu2_on = new Image();
  bu2_on.src = "images/drop-down-menu/bu2_on.gif";
  bu2_out = new Image();
  bu2_out.src = "images/drop-down-menu/bu2_off.gif";

  bu3_on = new Image();
  bu3_on.src = "images/drop-down-menu/bu3_on.gif";
  bu3_out = new Image();
  bu3_out.src = "images/drop-down-menu/bu3_off.gif";

  bu4_on = new Image();
  bu4_on.src = "images/drop-down-menu/bu4_on.gif";
  bu4_out = new Image();
  bu4_out.src = "images/drop-down-menu/bu4_off.gif";

  bu5_on = new Image();
  bu5_on.src = "images/drop-down-menu/bu5_on.gif";
  bu5_out = new Image();
  bu5_out.src = "images/drop-down-menu/bu5_off.gif";

  bu6_on = new Image();
  bu6_on.src = "images/drop-down-menu/bu6_on.gif";
  bu6_out = new Image();
  bu6_out.src = "images/drop-down-menu/bu6_off.gif";

  bu7_on = new Image();
  bu7_on.src = "images/drop-down-menu/bu7_on.gif";
  bu7_out = new Image();
  bu7_out.src = "images/drop-down-menu/bu7_off.gif";

  bu8_on = new Image();
  bu8_on.src = "images/drop-down-menu/bu8_on.gif";
  bu8_out = new Image();
  bu8_out.src = "images/drop-down-menu/bu8_off.gif";

  bu9_on = new Image();
  bu9_on.src = "images/drop-down-menu/bu9_on.gif";
  bu9_out = new Image();
  bu9_out.src = "images/drop-down-menu/bu9_off.gif";

  bu10_on = new Image();
  bu10_on.src = "images/drop-down-menu/bu10_on.gif";
  bu10_out = new Image();
  bu10_out.src = "images/drop-down-menu/bu10_off.gif";

  bu11_on = new Image();
  bu11_on.src = "images/drop-down-menu/bu11_on.gif";
  bu11_out = new Image();
  bu11_out.src = "images/drop-down-menu/bu11_off.gif";

  bu12_on = new Image();
  bu12_on.src = "images/drop-down-menu/bu12_on.gif";
  bu12_out = new Image();
  bu12_out.src = "images/drop-down-menu/bu12_off.gif";

  bu13_on = new Image();
  bu13_on.src = "images/drop-down-menu/bu13_on.gif";
  bu13_out = new Image();
  bu13_out.src = "images/drop-down-menu/bu13_off.gif";

  bu14_on = new Image();
  bu14_on.src = "images/drop-down-menu/bu14_on.gif";
  bu14_out = new Image();
  bu14_out.src = "images/drop-down-menu/bu14_off.gif";

  bu15_on = new Image();
  bu15_on.src = "images/drop-down-menu/bu15_on.gif";
  bu15_out = new Image();
  bu15_out.src = "images/drop-down-menu/bu15_off.gif";

  bu16_on = new Image();
  bu16_on.src = "images/drop-down-menu/bu16_on.gif";
  bu16_out = new Image();
  bu16_out.src = "images/drop-down-menu/bu16_off.gif";

  bu17_on = new Image();
  bu17_on.src = "images/drop-down-menu/bu17_on.gif";
  bu17_out = new Image();
  bu17_out.src = "images/drop-down-menu/bu17_off.gif";

  bu18_on = new Image();
  bu18_on.src = "images/drop-down-menu/bu18_on.gif";
  bu18_out = new Image();
  bu18_out.src = "images/drop-down-menu/bu18_off.gif";

  bu19_on = new Image();
  bu19_on.src = "images/drop-down-menu/bu19_on.gif";
  bu19_out = new Image();
  bu19_out.src = "images/drop-down-menu/bu19_off.gif";

  bu20_on = new Image();
  bu20_on.src = "images/drop-down-menu/bu20_on.gif";
  bu20_out = new Image();
  bu20_out.src = "images/drop-down-menu/bu20_off.gif";

  bu21_on = new Image();
  bu21_on.src = "images/drop-down-menu/bu21_on.gif";
  bu21_out = new Image();
  bu21_out.src = "images/drop-down-menu/bu21_off.gif";

  bu22_on = new Image();
  bu22_on.src = "images/drop-down-menu/bu22_on.gif";
  bu22_out = new Image();
  bu22_out.src = "images/drop-down-menu/bu22_off.gif";

  bu23_on = new Image();
  bu23_on.src = "images/drop-down-menu/bu23_on.gif";
  bu23_out = new Image();
  bu23_out.src = "images/drop-down-menu/bu23_off.gif";

  bu24_on = new Image();
  bu24_on.src = "images/drop-down-menu/bu24_on.gif";
  bu24_out = new Image();
  bu24_out.src = "images/drop-down-menu/bu24_off.gif";

  bu25_on = new Image();
  bu25_on.src = "images/drop-down-menu/bu25_on.gif";
  bu25_out = new Image();
  bu25_out.src = "images/drop-down-menu/bu25_off.gif";

  bu26_on = new Image();
  bu26_on.src = "images/drop-down-menu/bu26_on.gif";
  bu26_out = new Image();
  bu26_out.src = "images/drop-down-menu/bu26_off.gif";

  bu27_on = new Image();
  bu27_on.src = "images/drop-down-menu/bu27_on.gif";
  bu27_out = new Image();
  bu27_out.src = "images/drop-down-menu/bu27_off.gif";

  bu28_on = new Image();
  bu28_on.src = "images/drop-down-menu/bu28_on.gif";
  bu28_out = new Image();
  bu28_out.src = "images/drop-down-menu/bu28_off.gif";

  bu29_on = new Image();
  bu29_on.src = "images/drop-down-menu/bu29_on.gif";
  bu29_out = new Image();
  bu29_out.src = "images/drop-down-menu/bu29_off.gif";

  bu30_on = new Image();
  bu30_on.src = "images/drop-down-menu/bu30_on.gif";
  bu30_out = new Image();
  bu30_out.src = "images/drop-down-menu/bu30_off.gif";

  bu31_on = new Image();
  bu31_on.src = "images/drop-down-menu/bu31_on.gif";
  bu31_out = new Image();
  bu31_out.src = "images/drop-down-menu/bu31_off.gif";

  bu32_on = new Image();
  bu32_on.src = "images/drop-down-menu/bu32_on.gif";
  bu32_out = new Image();
  bu32_out.src = "images/drop-down-menu/bu32_off.gif";

  bu33_on = new Image();
  bu33_on.src = "images/drop-down-menu/bu33_on.gif";
  bu33_out = new Image();
  bu33_out.src = "images/drop-down-menu/bu33_off.gif";
}
  
function msoverSide(imgName) {
  if (true){
  document.images[imgName].src = "images/drop-down-menu/" + imgName + "_on.gif";
  }
}

function msoutSide(imgName) {
  if (true){
  document.images[imgName].src = "images/drop-down-menu/" + imgName + "_off.gif";
  }
}