js的UniCode转码问题 （代码）

<script type="text/javascript"><br/>        var GB2312UnicodeConverter = {<br/>            ToUnicode: function (str) {<br/>                return escape(str).toLocaleLowerCase().replace(/%u/gi, '\u');<br/>            }<br/>            , ToGB2312: function (str) {<br/>                return unescape(str.replace(/\u/gi, '%u'));<br/>            }<br/>        };<br/><br/>        var str = '上海', unicode;<br/>        document.write(str + '<br/>');<br/>        unicode = GB2312UnicodeConverter.ToUnicode(str);<br/>        document.write('汉字转换为Unicode代码：' + unicode + '<br/><br/>');<br/>        document.write('Unicode代码转换为汉字：' + GB2312UnicodeConverter.ToGB2312(unicode));<br/>    </script><br/>

/// <summary><br/>        /// 汉字转换为Unicode编码<br/>        /// </summary><br/>        /// <param name="str">要编码的汉字字符串</param><br/>        /// <returns>Unicode编码的的字符串</returns><br/>        public static string ToUnicode(string str)<br/>        {<br/>            byte[] bts = Encoding.Unicode.GetBytes(str);<br/>            string r = "";<br/>            for (int i = 0; i < bts.Length; i += 2) r += "\u" + bts[i + 1].ToString("x").PadLeft(2, '0') + bts[i].ToString("x").PadLeft(2, '0');<br/>            return r;<br/>        }<br/>        /// <summary><br/>        /// 将Unicode编码转换为汉字字符串<br/>        /// </summary><br/>        /// <param name="str">Unicode编码字符串</param><br/>        /// <returns>汉字字符串</returns><br/>        public static string ToGB2312(string str)<br/>        {<br/>            string r = "";<br/>            MatchCollection mc = Regex.Matches(str, @"\u([w]{2})([w]{2})", RegexOptions.Compiled | RegexOptions.IgnoreCase);<br/>            byte[] bts = new byte[2];<br/>            foreach (Match m in mc)<br/>            {<br/>                bts[0] = (byte)int.Parse(m.Groups[2].Value, NumberStyles.HexNumber);<br/>                bts[1] = (byte)int.Parse(m.Groups[1].Value, NumberStyles.HexNumber);<br/>                r += Encoding.Unicode.GetString(bts);<br/>            }<br/>            return r;<br/>        }<br/>