Flash detection

<head>
<SCRIPT LANGUAGE="JavaScript" type="text/javascript">
<!--
var requiredVersion = 6;
var useRedirect = true;
var noFlashPage = "no_flash.html?msg=no"
var upgradePage = "no_flash.html?msg=upgrade"
var flash2Installed = false;
var flash3Installed = false;
var flash4Installed = false;
var flash5Installed = false;
var flash6Installed = false;
var flash7Installed = false;
var maxVersion = 7;
var actualVersion = 0;
var hasRightVersion = false;
var jsVersion = 1.0;

function got_flash(version, jsVersion) {
  var url = "main.php?flash_version=" + version;
  if(jsVersion > 1.0) {
    window.location.replace(url);
  } else {
    window.location = url;
  }
}

// -->
</SCRIPT>

<SCRIPT LANGUAGE="JavaScript1.1" type="text/javascript">
<!--
var isIE = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
var isWin = (navigator.appVersion.indexOf("Windows") != -1) ? true : false;
jsVersion = 1.1;

if(isIE && isWin){
  document.write('<SCR'+'IPT LANGUAGE="VBScript"\> \n');
  document.write('on error resume next \n');
  document.write('flash2Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.2"))) \n');
  document.write('flash3Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.3"))) \n');
  document.write('flash4Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.4"))) \n');
  document.write('flash5Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.5"))) \n');
  document.write('flash6Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.6"))) \n');
  document.write('flash7Installed = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.7"))) \n');
  document.write('</SCR'+'IPT\> \n');
}
// -->
</SCRIPT>

<SCRIPT LANGUAGE="JavaScript" type="text/javascript">
<!--

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;

      var flashVersion = parseInt(flashDescription.charAt(flashDescription.indexOf(".") - 1));
 
      flash2Installed = flashVersion == 2; 
      flash3Installed = flashVersion == 3;
      flash4Installed = flashVersion == 4;
      flash5Installed = flashVersion == 5;
      flash6Installed = flashVersion == 6;
      flash7Installed = flashVersion >= 7;
    }
  }

  for (var i = 2; i <= maxVersion; i++) {
    if (eval("flash" + i + "Installed") == true) actualVersion = i;
  }

  if(navigator.userAgent.indexOf("WebTV") != -1) actualVersion = 3;

  if (actualVersion >= requiredVersion) {
    got_flash(actualVersion, jsVersion);
  } else {
    if(jsVersion > 1.0) {
      window.location.replace((actualVersion >= 2) ? upgradePage : noFlashPage);
    } else {
      window.location = (actualVersion >= 2) ? upgradePage : noFlashPage;
    }
  }
}

// -->
</SCRIPT>
</head>
<body bgcolor="white" onLoad="java script:detectFlash();">