​x
 
<!DOCTYPE html> 
<html> 
<body> 
​
<video id="myVideo" width="640" height="360">
  <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="enableControls()" type="button">启用控件</button>
<button onclick="disableControls()" type="button">禁用控件</button>
<button onclick="checkControls()" type="button">检查控件状态</button>
​
<script>
var x = document.getElementById("myVideo");
​
function enableControls() { 
  x.controls = true;
  x.load();
} 
​
function disableControls() { 
  x.controls = false;
  x.load();
} 
  
function checkControls() { 
  alert(x.controls);
} 
</script> 
​
</body> 
</html>
​