Google Chart Tools -initializing data source for organizational data

loadOrgChart.js

function loadOrgChart() {
    var soapEnv =
            "<soapenv:Envelope xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/'> \
                <soapenv:Body> \
                     <GetListItems xmlns='http://schemas.microsoft.com/sharepoint/soap/'> \
                        <listName>" + google.OrgChartData.ListName + "</listName> \
                        <viewFields> \
                            <ViewFields> \
                               <FieldRef Name='" + google.OrgChartData.TitleFieldName + "' /> \
                               <FieldRef Name='" + google.OrgChartData.TooltipFieldName + "' /> \
                               <FieldRef Name='" + google.OrgChartData.ParentFieldName + "' /> \
                               <FieldRef Name='" + google.OrgChartData.StyleFieldName + "' /> \
                           </ViewFields> \
                        </viewFields> \
                    </GetListItems> \
                </soapenv:Body> \
            </soapenv:Envelope>";

    $.ajax({
        url: L_Menu_BaseUrl + "/_vti_bin/lists.asmx",
        type: "POST",
        dataType: "xml",
        data: soapEnv,
        complete: onOrgChartDataLoaded,
        contentType: "text/xml; charset=\"utf-8\""
    });
}