<button onclick="changeSource()" type="button">更改视频</button>
<video id="video1" controls="controls" autoplay="autoplay">
<source id="mp4_src" src="/example/html5/mov_bbb.mp4" type="video/mp4">
<source id="ogg_src" src="/example/html5/mov_bbb.ogg" type="video/ogg">
Your browser does not support HTML5 video.
document.getElementById("mp4_src").src="/img/movie.mp4";
document.getElementById("ogg_src").src="/img/movie.ogg";
document.getElementById("video1").load();