function detectFlash() {
  if (navigator.plugins) {
    if (navigator.plugins["Shockwave Flash 2.0"]
        || navigator.plugins["Shockwave Flash"]) {
      var isVersion2 = navigator.plugins["Shockwave Flash 2.0"] ? " 2.0" : "";
      var flashDescription = navigator.plugins["Shockwave Flash" + isVersion2].description;
      // DEBUGGING: uncomment next line to see the actual description.
      // alert("Flash plugin description: " + flashDescription);
      var flashVersion = parseInt(flashDescription.charAt(flashDescription.indexOf(".") - 1));
      flash2Installed = flashVersion == 2;
      flash3Installed = flashVersion == 3;
      flash4Installed = flashVersion == 4;
      flash5Installed = flashVersion == 5;
      flash6Installed = flashVersion >= 6;
    }
  }

  for (var i = 2; i <= maxVersion; i++) {
    if (eval("flash" + i + "Installed") == true) actualVersion = i;
  }
  if(navigator.userAgent.indexOf("WebTV") != -1) actualVersion = 3;

  // DEBUGGING: uncomment next line to display flash version
  // alert("version detected: " + actualVersion);
  if (actualVersion >= requiredVersion) {
    if (useRedirect) {
      if(jsVersion > 1.0) {
        window.location.replace(flashPage);
      } else {
        window.location = flashPage;
      }
    }
    hasRightVersion = true;
  } else {
    if (useRedirect) {
      if(jsVersion > 1.0) {
        window.location.replace((actualVersion >= 2) ? upgradePage : noFlashPage);
      } else {
        window.location = (actualVersion >= 2) ? upgradePage : noFlashPage;
      }
    }
  }
}


detectFlash();