static string GetHtml(string url)
        {
            HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
            request.Timeout = 16 * 1000;
            HttpWebResponse response = request.GetResponse() as HttpWebResponse;           
            Stream stream = response.GetResponseStream();
            StreamReader reader = new StreamReader(stream, Encoding.Default);
            string html = reader.ReadToEnd();
            stream.Close();
            return html;
        }
        static string FiltHtml(string htmlStr)
        {
            var jsurl = Regex.Match(htmlStr, "(?