Showing Number of Notes on Notes Tab

var totalNotes = getTotalNotes(crmForm.ObjectId);
setNoteTabName(totalNotes);

function setNoteTabName(count) {
    /* update note tab */
    if (crmForm.FormType != 1) {
        var cells = document.getElementsByTagName("A");
        for (var i = 0; i < cells.length; i++) {
            if (cells[i].innerText == "Notes") {
                if (count > 0) {
                    cells[i].innerText = "Notes (" + count + ")";
                    document.all.crmTabBar.style.width = "auto";
                }
                break;
            }
        }
    }
}
// Helper method to return the total notes associated with an object
function getTotalNotes(objectId) {
    // Define SOAP message
    var xml =
[
"<?xml version='1.0' encoding='utf-8'?>",
"<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" ",
"xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" ",
"xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">",
GenerateAuthenticationHeader(),
"<soap:Body>",
"<RetrieveMultiple xmlns='http://schemas.microsoft.com/crm/2007/WebServices'>",
"<query xmlns:q1='http://schemas.microsoft.com/crm/2006/Query' ",
"xsi:type='q1:QueryExpression'>",
"<q1:EntityName>annotation</q1:EntityName>",
"<q1:ColumnSet xsi:type=\"q1:ColumnSet\"><q1:Attributes><q1:Attribute>createdon</q1:Attribute></q1:Attributes></q1:ColumnSet>",
"<q1:Distinct>false</q1:Distinct><q1:Criteria><q1:FilterOperator>And</q1:FilterOperator>",
"<q1:Conditions><q1:Condition><q1:AttributeName>objectid</q1:AttributeName><q1:Operator>Equal</q1:Operator>",
"<q1:Values><q1:Value xsi:type=\"xsd:string\">",
objectId,
"</q1:Value></q1:Values></q1:Condition></q1:Conditions></q1:Criteria>",
"</query>",
"</RetrieveMultiple>",
"</soap:Body>",
"</soap:Envelope>"
].join("");
    var resultXml = executeSoapRequest("RetrieveMultiple", xml);
    return getMultipleNodeCount(resultXml, "q1:createdon");
}
// Helper method to execute a SOAP request
function executeSoapRequest(action, xml) {
    var actionUrl = "http://schemas.microsoft.com/crm/2007/WebServices/";
    actionUrl += action;
    var xmlHttpRequest = new ActiveXObject("Msxml2.XMLHTTP");
    xmlHttpRequest.Open("POST", "/mscrmservices/2007/CrmService.asmx", false);
    xmlHttpRequest.setRequestHeader("SOAPAction", actionUrl);
    xmlHttpRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
    xmlHttpRequest.setRequestHeader("Content-Length", xml.length);
    xmlHttpRequest.send(xml);
    var resultXml = xmlHttpRequest.responseXML;
    return resultXml;
}
// Helper method to return total # of nodes from XML
function getMultipleNodeCount(tree, el) {
    var e = null;
    e = tree.getElementsByTagName(el);
    return e.length;
}