public static function js($fileName, $base_path = true)
    {
        if (!is_array($fileName))
            $fileName = array($fileName);
        $data = null;
        foreach ($fileName as $file)
        {
            $data .= '<script src="';
            $data .= ($base_path) ? self::getJSLink() : '';
            $data .= $file . '"></script>' . PHP_EOL;
        }
        return $data;
    }