当提示改变时，oncuechange 属性在HTML中触发。它与
<video> <track oncuechange = "alert(‘Changed!’)”> </video>
您可以尝试运行以下代码来实现oncuchange 属性−
<!DOCTYPE HTML>
<html>
<body>
<video width = "300" height = "200" controls autoplay>
<source src = "/html5/foo.ogg" type = "video/ogg" />
<source src = "/html5/foo.mp4" type = "video/mp4" />
<track src = "subtitles_en.vtt" kind = "subtitles" srclang = "en" label="English" oncuechange = "alert(‘Changed!’)”>
Your browser does not support the video element.
</video>
</body>
</html>以上是当HTML中的
