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<!DOCTYPE html> 
<html> 
<body> 
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<p>本例演示如何将 "onvolumechange" 事件分配给 audio 元素。</p>
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<p>请尝试更改右下角的音量。</p>
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<audio controls onvolumechange="myFunction()">
  <source src="/i/horse.ogg" type="audio/ogg">
  <source src="/i/horse.mp3" type="audio/mpeg">
  Your browser does not support the audio element.
</audio>
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<script>
function myFunction() {
  alert("The volume has been changed!");
}
</script>
​
</body> 
</html>
​