property responseXML

    var request = shell.serviceManager.maxiXML.xmlHTTPRequest;
    request.open("GET","http://aol.musicnow.com/rss/genre/");
    request.onreadystatechange = function()
    {
        if(request.readyState == 4)
        {
            var responseXML = request.responseXML;
            if(responseXML)
                var rootElement = responseXML.documentElement;
        }
    }