SOURCE

var v=document.getElementById("myVideo");
v.addEventListener("loadeddata",function(){
  document.getElementById("demo").innerHTML = '视频可以播放了';
},false);
v.addEventListener("pause",function(){
  document.getElementById("demo").innerHTML = '已播放暂停，当前播放进度为：'+Math.round(v.currentTime/v.duration*100)+'%';
},false);

var a=document.getElementById("myAudio");
a.addEventListener("loadeddata",function(){
  document.getElementById("demo2").innerHTML = '音频可以播放了';
},false);
a.addEventListener("pause",function(){
  document.getElementById("demo2").innerHTML = '已播放暂停，当前播放进度为：'+Math.round(a.currentTime/a.duration*100)+'%';
},false);

视频播放:<br><br>
<video id="myVideo" width="320" height="240" controls>
	<source src="http://www.runoob.com/try/demo_source/movie.mp4" type="video/mp4">
  	<source src="http://www.runoob.com/try/demo_source/movie.ogg" type="video/ogg">
  	您的浏览器不支持 video 标签。
</video>
<p id="demo"></p>
<hr>
音频播放：<br><br>
<audio id="myAudio" controls>
    <source src="http://www.runoob.com/try/demo_source/horse.ogg" type="audio/ogg">
    <source src="http://www.runoob.com/try/demo_source/horse.mp3" type="audio/mpeg">
    您的浏览器不支持 audio 元素。
</audio>
<p id="demo2"></p>