public static function isSockCode($code)
 {
     if (!self::$_indexRefer) {
         self::$_indexRefer = array_merge(self::getMarket(), self::getSection());
     }
     foreach (self::$_indexRefer as $v) {
         if ($v['code'] == $code) {
             return false;
         }
     }
     return true;
 }