 time = this.player.currentTime - 5;
    if (time > this.player.duration || time < 0) {
      time = 0;
    }
    this.player.currentTime = time;
  } else if (e.keyCode == 39 || e.keyCode == 76) {
    if (!this.player.duration) return;
    var time = this.player.currentTime + 5;
    if (time > this.player.duration || time < 0) {
      time = 0;
    }
    this.player.currentTime = time;
  } else if (e.keyCode >= 48 && e.keyCode <= 57) {
    if (!this.player.duration) return;
    var percent = (e.keyCode - 48