outerHTML property not working in IE 10

I have a xml file, from that I need to read the specific node as string to append to stringBuilder. So if I read directly node it will not come as a string. So I am reading as outerHTML and it is working fine in Google Chrome and it is not in IE 10. Below is the sample code

    var secEssXMLDoc = '';
    if (window.ActiveXObject) {
        secEssXMLDoc = new ActiveXObject('Microsoft.XMLDOM');
        secEssXMLDoc.loadXML(secEssXML);
    }
    else if (window.XMLHttpRequest) {
    secEssXMLDoc = new DOMParser().parseFromString(secEssXML, 'text/xml');
    }
    xmlString.push("<SecondaryEssences>");
    for (var j = 0; j < secEssXMLDoc.getElementsByTagName('Emguid').length; j++) {
        if (document.getElementById('publishType').value == 'PLAYLIST') {
            xmlString.push(secEssXMLDoc.getElementsByTagName('Emguid')[j].outerHTML);
        }
        else {
            if (secEssXMLDoc.getElementsByTagName('Emguid')    [j].getAttribute("Essence").toUpperCase().contains('BROWSE')) {
                if (document.getElementById('lowResDownload').checked == false) {
                    secEssXMLDoc.getElementsByTagName('Emguid')[j].setAttribute("Selected", "true");
                }
                xmlString.push(secEssXMLDoc.getElementsByTagName('Emguid')[j].outerHTML);
            }
        }
    }

I tried outerText, outerXML none of these working. Please help me to fix this issue. Thanks in advance.