代码如下
<video id="video" controls="" style="display:none;width:160px;" preload="none" mediagroup="myVideoGroup" poster="http://media.w3.org/2010/05/sintel/poster.png">
<source id="mp4" src="http://media.w3.org/2010/05/sintel/trailer.mp4" type="video/mp4">
<p>Your user agent does not support the HTML5 Video element.</p>
</video>
<button onclick="play()">play()</button>
<script>
function play() {
var video = document.getElementById("video");
video.style.cssText +="display:block";
video.play();
}
</script>