/**
  * 
  */
 public function json_region()
 {
     header('Content-type: application/json');
     $id = $this->input->post('id');
     $region = $this->_region_model->getById($id);
     echo Zend_Json_Encoder::encode(array("id" => $region->reg_ia_id, "nombre" => $region->reg_c_nombre, "lat" => $region->lat, "lon" => $region->lon));
 }