browserName = navigator.appName; 
browserVer  = parseInt(navigator.appVersion); 
browser     = "NotOk"; 

//Detect if Netscape or MSIE version is ok 
if (browserName == "Netscape" && browserVer >= 3) { browser = "ok"} 
if (browserName == "Microsoft Internet Explorer" && browserVer >= 4) { browser = "ok"} 

//Initialize your images
if (browser == "ok") {
  //document.writeln('<EMBED SRC="/sound/over.wav" autostart=false HIDDEN=TRUE NAME="over" MASTERSOUND>');

  //Intro Buttons
  intro   = new Image(); intro.src   = "/img/buttons/intro/intro.gif";
  introup = new Image(); introup.src = "/img/buttons/intro/intro_up.gif";

  skip   = new Image(); skip.src    = "/img/buttons/intro/skip.gif";
  skipup = new Image(); skipup.src  = "/img/buttons/intro/skip_up.gif";
}

//Play sound
//function sound(status) {
//  if (status == "up") { document.over.play(); }
//}

//Swap Images
function swap(imgName, status) {
  if (browser == "ok") {
    imgOn = eval(imgName+status+".src");
    document.images[imgName].src = imgOn;
    //sound(status);
  }
}