Dynamically add options to an Option Set using JavaScript

Cross-Browser Solution For ActiveXObject with SOAP Retrieve Javascript CRM 2011 Update Rollup 2012

 We face an issue after update rollup that  Soap Request Through Javascript not working ActiveXobject is Not supported cross browser.We solve this issue using XMLHTTPREQUEST 
Following function works cross browser

function SoapRetrieve() {
   
    var accountid = Xrm.Page.getAttribute("account").getValue();
    if (accountid != null && accountid != "") {
        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\">" +
        Xrm.Page.context.getAuthenticationHeader() +
        "<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>account</q1:EntityName>" +
            "<q1:ColumnSet xsi:type='q1:ColumnSet'>" +
                "<q1:Attributes>" +
                    "<q1:Attribute>name</q1:Attribute>" +
                "</q1:Attributes>" +
            "</q1:ColumnSet>" +
        "<q1:Distinct>false</q1:Distinct>" +
        "<q1:PageInfo>" +
        "   <q1:PageNumber>1</q1:PageNumber>" +
        "   <q1:Count>1</q1:Count>" +
        "</q1:PageInfo>" +

        "<q1:Criteria>" +
        "<q1:FilterOperator>And</q1:FilterOperator>" +

        "<q1:Conditions>" +
                         "<q1:Condition>" +
                         "<q1:AttributeName>accountid</q1:AttributeName>" +
        "<q1:Operator>Equal</q1:Operator>" +
        "<q1:Values>" +
        "<q1:Value xmlns:q2='http://microsoft.com/wsdl/types/' xsi:type='q2:guid'>" +
        accountid[0].id +
        "</q1:Value></q1:Values></q1:Condition>" +

        "</q1:Conditions>" +
        "</q1:Criteria>" +

        "</query></RetrieveMultiple>" +
        "</soap:Body></soap:Envelope>";


        var xmlHttpRequest;
        var doc;
        var result;
        if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
            xmlHttpRequest = new XMLHttpRequest();
            xmlHttpRequest.open("POST", "/mscrmservices/2007/CrmService.asmx", false);
            xmlHttpRequest.setRequestHeader("SOAPAction", "http://schemas.microsoft.com/crm/2007/WebServices/RetrieveMultiple");
         xmlHttpRequest.setRequestHeader("Content-Type", "text/xml; charset=utf-8");
            xmlHttpRequest.setRequestHeader("Content-Length", xml.length);
            xmlHttpRequest.send(xml);
            result = xmlHttpRequest.responseXML.xml;
           
        }
        else {// code for IE6, IE5
            xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
            xmlHttpRequest.Open("POST", "/mscrmservices/2007/CrmService.asmx", false);

            xmlHttpRequest.setRequestHeader("Content-Length", xml.length);
            xmlHttpRequest.send(xml);
            result = xmlHttpRequest.responseXML.xml;


        }
        if (window.DOMParser) {
            parser = new DOMParser();
            doc = parser.parseFromString(xmlHttpRequest.responseText, "text/xml");
        }
        else // Internet Explorer
        {
            doc = new ActiveXObject("MSXML2.DOMDocument");
            doc.async = false;
            doc.loadXML(result);
        }
        if (doc.getElementsByTagName("q1:name").length > 0) {
           var A = doc.getElementsByTagName("q1:name").item(0).textContent
            alert(A);
        }
        else {
           
            var A = doc.getElementsByTagName("name").item(0).textContent
            alert(A);
        }
    }
}