protected void PageTransitions_SelectedIndexChanged(object sender, RadComboBoxSelectedIndexChangedEventArgs e)
    {
        Util util = new Util();
        Hashtable State = (Hashtable)HttpRuntime.Cache[Session.SessionID];
        if (util.CheckSessionTimeout(State, Response, "Default.aspx")) return;

        try
        {
            ClearMessages();

            PageTransitions.Text = e.Text;
            State["PageTransitionType"] = e.Value;
            XmlUtil x_util = new XmlUtil();
            x_util.SetPageTransitionType(State, e.Value);
            Message.Text = "The Page Transition Type has been set.";
        }
        catch (Exception ex)
        {
            util.LogError(State, ex);
            Message.Text = "Internal Error: " + ex.Message + ": " + ex.StackTrace;
        }
    }