Flash detection by JS.

Adobe has a JS file for detecting the Flash version, which is calling Flash detecting kit. However , it is a little bit mess. 

I made a clean version one. 

1. Download the AC_OETags.js

2. Create a new HTML page.

3. In head part, insert these codes:

Code
        <script type="text/javascript" src="AC_OETags.js"></script>
        <script language="JavaScript" type="text/javascript">
        
        <!--
        // -----------------------------------------------------------------------------
        // Globals
        // Major version of Flash required
        var requiredMajorVersion = 9;
        // Minor version of Flash required
        var requiredMinorVersion = 0;
        // Minor revision of Flash required
        var requiredRevision = 0;
        // -----------------------------------------------------------------------------
        // -->
        
        </script>

4. In body part, insert these JS codes, just follow by your Flash code:

Body Code
  <script language="JavaScript" type="text/javascript">
    <!--
    // Version check based upon the values entered above in "Globals"
    var hasReqestedVersion = DetectFlashVer(requiredMajorVersion, requiredMinorVersion, requiredRevision);
    
    // Check to see if the version meets the requirements for playback
    if (!hasReqestedVersion)
     {  // flash is too old or we can't detect the plugin
        var alternateContent = '<p>This content requires the Adobe Flash Player version ' ;
        alternateContent +=  requiredMajorVersion + '.<br />'
        + '<a href=http://www.adobe.com/go/getflash/>Get Flash</a></p>';
        document.write(alternateContent);  // insert non-flash content
    }
    // -->
    </script>
    <noscript>
    <a href="http://www.adobe.com/go/getflashplayer">Download Flash 9</a>
    </noscript>

Done. You can setup the Min Flash Version requirement in JS code, and you will see a message and download flash link if the browser does not meet the your Flash version.

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Update.

这个解决方案现在发现了一个bug， 当用户已经有了flash 10 player的时候，这个探测脚本仍然会提示用户升级flash，我估计可能因为这个方案出炉的时候，还没有flash 10 player，而且falsh10 改变了不少，导致了这个bug。

另一种解决方案， 用swfobject2 侦测flash版本， swfobject2 内置了这个功能，但我还没有在 flash10 下测试过。