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<!DOCTYPE html>
<html>
<body>
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<p>本例演示如何将 "onplay" 事件分配给 video 元素。</p>
​
<p>Press play.</p>
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<video controls onplay="myFunction()">
  <source src="/i/photo/shanghai.mp4" type="video/mp4">
  Your browser does not support HTML5 video.
</video>
​
​
<script>
function myFunction() {
  alert("The video has started to play");
}
</script>
​
</body>
</html>
​