好比赛，精彩

好久没来了，看看(function hold() {        var videoElement = document.querySelector('#CTPmediaElement0');        if (videoElement == null) return;        var position = -1;        videoElement.addEventListener('play', function() {            if (position > 0) {                videoElement.currentTime = position;            }            position = -1;        });        document.addEventListener('visibilitychange', function() {            if (document.visibilityState === 'hidden' && videoElement.paused) {                position = videoElement.currentTime;            }        });    })(window);