1、新建html文档。
2、书写代码。<div style="height:0; overflow:hidden;"><video id="video1" controls="controls" autoplay="autoplay" loop="-1"> <source id="mp4_src" src="images/wher.mp3" type="video/mp4"> <source id="ogg_src" src="images/wher.mp3" type="video/ogg"> Your browser does not support HTML5 video.<ideo><script>function changeSource() { document.getElementById("mp4_src").src="movie.mp4"; document.getElementById("ogg_src").src="movie.ogg"; document.getElementById("video1").load(); }</script></div>
3、注意：<source>标签的路径和js里面的路径。loop="挢旗扦渌;-1"这个是播放次数无限循环，-1可以修改。可以是1，2...
