protected void btnGuardar_Click(object sender, EventArgs e)
        {
            string idstr = boxID.Text;

            Debug.WriteLine("ID AL wardar: " + idstr);

            try
            {
                if (String.IsNullOrEmpty(idstr)) //new
                {
                    Message msg = new Message();
                    msg.Name    = boxNombre.Text;
                    msg.Email   = boxEmail.Text;
                    msg.Subject = boxAsunto.Text;
                    msg.Content = boxContenido.InnerText;

                    MessageDAO.AddMessage(msg);
                }
                else //update
                {
                    Message msg = new Message();
                    msg.Id      = int.Parse(idstr);
                    msg.Name    = boxNombre.Text;
                    msg.Email   = boxEmail.Text;
                    msg.Subject = boxAsunto.Text;
                    msg.Content = boxContenido.InnerText;

                    MessageDAO.ModMessage(msg);
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex.StackTrace);
                Debug.WriteLine(ex.Message);
            }

            Response.Redirect("~/MessageList");
            Context.ApplicationInstance.CompleteRequest();
        }