code: function( string ) {
              if ( window.DOMParser ) {
  
                  $.parseXml = function( string ) {
                      var xmlDoc = null,
                          parser;
  
                      parser = new DOMParser();
                      xmlDoc = parser.parseFromString( string, "text/xml" );
                      return xmlDoc;
                  };
  
              } else if ( window.ActiveXObject ) {
  
                  $.parseXml = function( string ) {
                      var xmlDoc = null;
  
                      xmlDoc = new ActiveXObject( "Microsoft.XMLDOM" );
                      xmlDoc.async = false;
                      xmlDoc.loadXML( string );
                      return xmlDoc;
                  };
  
              } else {
                  throw new Error( "Browser doesn't support XML DOM." );
              }
  
              return $.parseXml( string );
          }
docs: Parses an XML string into a DOM Document.
  @function
  @param {String} string
  @returns {Document}