private string Eliminar(string id)
        {
            JavaScriptSerializer serializer = new JavaScriptSerializer();

            try
            {
                ServicioParametricas servicio = new ServicioParametricas();

                servicio.PlantillaEliminar(id);

                return(serializer.Serialize(new { result = "OK" }));
            }
            catch (Exception ex)
            {
                return(serializer.Serialize(new { result = "Error", message = ex.Message }));
            }
        }