private static string GetDomain(string strURL)
        {
            string retVal;
            string strRegex = @"(\.com/|\.net/|\.cn/|\.org/|\.gov/)";
            Regex r = new Regex(strRegex, RegexOptions.IgnoreCase);
            Match m = r.Match(strURL);
            retVal = m.ToString();
            strRegex = @"\.|/$";
            retVal = Regex.Replace(retVal, strRegex, "").ToString();
            if (retVal == "")
                retVal = "other";
            return retVal;
        }