​x
 
<!DOCTYPE html> 
<html> 
<body> 
​
<video id="myVideo" width="640" height="360" controls>
  <source src="/i/video/shanghai.mp4" type="video/mp4">
  <source src="/i/video/shanghai.ogg" type="video/ogg">
  您的浏览器不支持 video 标签。
</video><br>
​
<button onclick="enableMute()" type="button">静音</button>
<button onclick="disableMute()" type="button">打开声音</button>
<button onclick="checkMute()" type="button">检查静音状态</button>
​
<script>
var x = document.getElementById("myVideo");
​
function enableMute() { 
  x.muted = true;
}
 
function disableMute() { 
  x.muted = false;
}
 
function checkMute() { 
  alert(x.muted);
} 
</script> 
​
</body> 
</html>
​