private void approve(string sTSUids, SPWeb web, string period)
        {
            XmlDocument doc = new XmlDocument();

            doc.LoadXml("<Approve><Period>" + period + "</Period><TSIDS>" + sTSUids + "</TSIDS></Approve>");

            XmlDocument docRet = new XmlDocument();

            docRet.LoadXml(TimesheetAPI.ApproveTimesheets(doc.OuterXml, web));

            if (docRet.FirstChild.Attributes["Status"].Value == "1")
            {
                data = "Error: " + docRet.FirstChild.SelectSingleNode("//Error").InnerText;
            }
            else
            {
                data = "Success";
            }
        }