<html><body><p>此示例使用 HTML DOM 将“onplay”事件分配给视频元素。</p><p>按下播放键。</p><video controls id="myVideo"> <source src="mov_bbb.mp4" type="video/mp4"> <source src="mov_bbb.ogg" type="video/ogg"> 您的浏览器不支持 HTML5 video 视频。</video><p>视频由 <a href="https://www.bigbuckbunny.org/" target="_blank">Big Buck Bunny</a> 提供。</p><script>document.getElementById("myVideo").onplay = function() {myFunction()};function myFunction() { alert("The video has started to play.");}</script></body></html>