protected void btnBrowseUsers_Click(object sender, System.Web.UI.ImageClickEventArgs e)
        {
            if (MessageBox != null)
            {
                MessageBox.ClearMessage();
            }

            this.pnlNewUser.Visible = false;
            if (pnlUserBrowser.Visible == true)
            {
                pnlUserBrowser.Visible = false;
            }
            else
            {
                this.pnlUserBrowser.Visible = true;
                LoadUsers();
            }
        }