//instantiate the W3C DOM Parser
 var parser = new DOMImplementation();

 //load the XML into the parser and get the DOMDocument
 var domDoc = parser.loadXML($xmlData);

 domDoc.getDocumentElement().getElementsByTagName("InitialTransform").item(0).firstChild.setNodeValue("Jogh");
 
 $xmlData=domDoc.getDocumentElement().getXML();