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; 
}