This script i have modified. With this script you can check if Flash is installed.
CODE
<script language="javascript" type="text/javascript">

  <!--



  var flashinstalled = 0;

  var flashversion = 0;

  MSDetect = "false";

  if (navigator.plugins && navigator.plugins.length)

  {

     x = navigator.plugins["Shockwave Flash"];

     if (x)

     {

        flashinstalled = 2;

        if (x.description)

        {

           y = x.description;

           flashversion = y.charAt(y.indexOf('.')-1);

        }

     }

     else

        flashinstalled = 1;

     if (navigator.plugins["Shockwave Flash 2.0"])

     {

        flashinstalled = 2;

        flashversion = 2;

     }

  }

  else if (navigator.mimeTypes && navigator.mimeTypes.length)

  {

     x = navigator.mimeTypes['application/x-shockwave-flash'];

     if (x && x.enabledPlugin)

        flashinstalled = 2;

     else

        flashinstalled = 1;

  }

  else

     MSDetect = "true";





  // -->

  </script>



  <script language="vbscript" type="text/vbscript">



  on error resume next



  If MSDetect = "true" Then

     For i = 2 to 6

        If Not(IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash." & i))) Then



        Else

           flashinstalled = 2

           flashversion = i

        End If

     Next

     If flashinstalled = 0 Then

        flashinstalled = 1

     End If

  End If



  </script>



<script language="javascript" type="text/javascript">

<!--

if (flashinstalled == 2)

{

  if (flashversion)

     document.write("You have Flash version " + flashversion + " installed.");

  else

     document.write("You have Flash installed, but I can't detect the version.");

}

else if (flashinstalled == 1) document.write("You don't have Flash installed.");

else document.write("I can't find out if you have Flash installed.");

// -->

</script>

 

 

 


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