Tutor.com Classroom How-To #10: manually detecting and installing the Silverlight plug-in

These How-To tips are taken from The Tutor.com Classroom: Architecture and techniques using Silverlight, WPF, and the Microsoft .NET Framework.

You can check out the Silverlight Tutor.com Classroom in "practice" mode, although the real experience is with a live tutor on the other side!

Use the isInstalled() function provided by Silverlight.js:

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

Silverlight.InstallAndCreateSilverlight = function(version)
{
  var retryTimeout = 1000; //the interval at which instantiation is attempted(ms)
  if (Silverlight.isInstalled(version))
  {
    ...
  }
  else if (!Silverlight.isInstalled(version))
  {
    TimeoutDelegate = function()
    {
      Silverlight.InstallAndCreateSilverlight(version);
    }

    setTimeout(TimeoutDelegate, retryTimeout);
  }
}

Silverlight.InstallAndCreateSilverlight('2.0.30923.0');

</script>