JavaScript：addEventListener()和removeEventListener()追加事件和删除追加事件

例如要为div上的某个按钮，添加监听事件

var btn = document.getElementById("myBtn");
btn.addEventListener("click", function () {
  alert(this.id);
}, false);

>>Cesium的timeline监听事件如何移除：http://blog.sina.com.cn/s/blog_15e866bbe0102yysg.html

要移除，首先要有timeline：

    createTimeLine() {if (!window.viewer.timeline) {    // Timeline
          var timelineContainer = document.createElement('div');
          timelineContainer.className = 'cesium-viewer-timelineContainer';
          timelineContainer.style.right = '0px';
          viewerContainer.appendChild(timelineContainer);
          var timeline = new Cesium.Timeline(timelineContainer, window.viewer.clock);
          timeline.addEventListener('settime', this.onTimelineScrubfunction, false);
          timeline.zoomTo(window.viewer.clock.startTime, window.viewer.clock.stopTime);
          this.timeline = timeline;
        }
      },

方法二：