//////////////////////////////////////////////////////////////////
// get major Silverlight version
// Return values:
// 0 -> Silverlight not installed (at least not properly).
// 1 -> Silverlight 1 installed
// 2 -> Silverlight 2 installed
// 3 -> Silverlight 3 installed
//////////////////////////////////////////////////////////////////
 
var 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;
}