ntentType: config.audioType}],
                                videoCapabilities: [{contentType: config.videoType}],
                                sessionTypes: ['persistent-license']},
            assertions = [];

        var _mediaKeys,
            _mediaKeySession;

        config.video = document.getElementById('videoelement');
        config.messagehandler = (new MessageHandler(config.keysystem, config.content, 'persistent-license')).messagehandler;

        function onComplete() {
            windo