public function _initDB()
 {
     $this->_dB = Flight::connectMysqlDB();
     if (!$this->_dB) {
         $this->errMsg = "db error";
         $this->errCode = GAME_ERR_DB_EXEC;
         return false;
     }
     return true;
 }
 public static function closeMysqlDB()
 {
     $mysqlDB = Flight::connectMysqlDB();
     mysql_close($mysqlDB);
 }