getSilverlightVersion = function() 
{
 var SLVersion;
 try 
   {  
    try 
       {
        var control = new ActiveXObject('AgControl.AgControl');
        if (control.IsVersionSupported("3.0"))                
           SLVersion = 3;
        else
        if (control.IsVersionSupported("2.0"))               
           SLVersion = 2;
        else
           SLVersion = 1;           
        control = null;
      }
    catch (e) 
      {      
       var plugin = navigator.plugins["Silverlight Plug-In"];
       if (plugin)
       {         
         if (plugin.description === "1.0.30226.2")             
            SLVersion = 2;
         else
            SLVersion = parseInt(plugin.description[0]);
        }
        else
           SLVersion = 0;
      }
   }
 catch (e) 
   { 
    SLVersion = 0;
   }
 return SLVersion;
}