For a while ago I needed to provide an alternative solution when Silverlight isn’t installed. I searched for javascript code for this and found this: A blog post about that: Piotr Puszkiewicz’s Silverlight Blog. Determining if Silverlight is installed using Javascript. A more advanced javascript function which can even determine the version of the Silerlight can be pulled from Silverlight.js library. I didn’t need to determine the version of Silverlight, so I wrote a simplified js function (but it works in all browsers): [sourcecode language=“javascript”] var isSilverlightInstalled = function() { var installed = false; try { installed = !