public function validation()
 {
  $ret = TRUE;

  $this->post_data = array(
   's_member_id' => $this->input->post('s_member_id'),
   's_password' => $this->input->post('s_password'),
   'referer' => $this->input->get_post('referer'),
   'ip_addr' => $this->input->ip_address()
  );

  // validation configure
  $config = array(
   array('field' => 's_member_id', 'label' => 'S_member_id', 'rules' => 'required|trim|xss_clean' ),
   array('field' => 's_password', 'label' => 'S_password', 'rules' => 'required|trim|xss_clean' ),
  );

  if($this->form_chk($config) == FALSE) {
   $this->responseCode = -1;
   
   foreach($this->error_chk() as $err) {
    if(strstr($err, 'S_member_id')) {
     $this->responseCode = 1;
     $err = $this->lang->line('s_member_id_error_msg');
     break;
    }
    if(strstr($err, 'S_password')) {
     $this->responseCode = 2;
     $err = $this->lang->line('s_password_error_msg');
     break;
    }
    if(strstr($err, 'S_jumin')) {
     $this->responseCode = 3;
     $err = $this->lang->line('s_jumin_error_msg');
     break;
    }
   }

   $this->responseMessage = $err ? $err : $this->lang->line('default_error_msg');
   $ret=FALSE;
  }

  $this->data = $this->post_data;

  return $ret;
 }

    /**
     * 사용자 값 검증 후 에러를 검증 한다.
     *
     * @return array
     */
    public function error_chk()
    {
        return explode("\n", strip_tags(validation_errors()));
    }

    /**
     * 입력된 사용자 값을 확인 한다.
     *
     * @return void
     */
    protected function form_chk($config)
    {
         // 필수 라이브러리 등록
        $this->load->library('form_validation');

        $this->form_validation->set_rules($config);

        return $this->form_validation->run();
    }