video 播放视频禁止拖动进度条

   <video id="my-video" class="video-js vjs-big-play-centered" controls="controls" poster=""  webkit-playsinline="true">
        <source src="/paper/questions/getVideo" type='video/mp4'>
   </video>

   var elevideo = document.getElementById('my-video');
   var that = this;
   var resetTime = 0; // 拖动后重置播放时间
   var curTime = 0;  // 当前播放时间
   var getCurTime = localStorage.getItem('remTime'); //获取本地存储
   if ( getCurTime > 0.1) {
        curTime = getCurTime;
        resetTime = getCurTime;
        elevideo.addEventListener('play',function(){
            setTimeout(function(){
                elevideo.currentTime = getCurTime;
                setInterval(timer,100)
            },2000)
        })
   } else {
        elevideo.play();
        setInterval(timer,100)
   }

   // 定时器
   function timer () {
        curTime = elevideo.currentTime;
        var apartTime = curTime - resetTime;
        if(apartTime > 2) {
            elevideo.currentTime = resetTime;
        } else {
            resetTime = curTime;
        }
        that.curTime = curTime;
   }

   elevideo.addEventListener('pause',function(){
        localStorage.setItem('remTime',that.curTime);
   })