public function screen_detail_message()
 {
     $message_id = "";
     unset($_SESSION['message_id']);
     if (isset($_GET['message_id'])) {
         $message_id = $_GET['message_id'];
     }
     if ($this->action == "transmit") {
         $this->title = "送信メッセージ";
         $this->message = "送信日時";
         $var = "transmit";
     } else {
         if ($this->action == "receive") {
             $this->title = "受信メッセージ";
             $this->message = "受信日時";
             $this->next_type = "reply_message";
             $this->next_action = "form";
             $var = "receive";
         }
     }
     $this->file = "member_detail_message.tpl";
     $ActionModel = new ActionModel();
     $MessageModel = new MessageModel();
     $message_data = $MessageModel->member_detail_message_messsage_id($message_id);
     $process = $ActionModel->get_action_process_id($message_data['action_id']);
     $this->view->assign('var', $var);
     $this->view->assign('process', $process);
     $this->view->assign('data', $message_data);
     $this->view_display();
 }