if (typeof (Sys) !== 'undefined') {
  Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
    
}


function EndRequestHandler(sender, args)
{
    if (args.get_error() != undefined)
    {
        var errorMessage;
        var errorCode;
               
        errorCode = args.get_response().get_statusCode();
        errorMessage = args.get_error().message;
              
        if ( errorCode == 12031 || errorCode == 12029 || errorCode == 12007 || errorCode == 200 )
        {
            args.set_errorHandled(true);
        }
        else
        {
            errorMessage = "Unhandled Error Code";
        }
    }
}