title: modify XML file using XMLDOM
body: <p>I am not able to modify my xml using XMLSerializer...
  My code is</p>
  
  <pre><code>var xml = request.responseText;
  var DOMParser = require( 'xmldom' ).DOMParser;
  var parser = new DOMParser();
  var document = parser.parseFromString( xml, 'text/xml' );
  document.getElementsByTagName( "a:Value" ).nodeValue = 12345;
  var XMLSerializer = require( 'xmldom' ).XMLSerializer;
  var serializer = new XMLSerializer();
  var writetofile = serializer.serializeToString( document );
  console.log( "writetofile" + writetofile );
  </code></pre>
  
  <p>I am getting XML with same old value not 12345.</p>
  
  <p>Please let me know how to resolve this..tried all the options..still not working.:(</p>