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<!DOCTYPE html> 
<html> 
<body> 
<audio id="myAudio" controls>
  <source src="horse.ogg" type="audio/ogg">
  <source src="horse.mp3" type="audio/mpeg">
  Your browser does not support the audio element.
</audio><br>
<button onclick="enableControls()" type="button">Enable controls</button>
<button onclick="disableControls()" type="button">Disable controls</button>
<button onclick="checkControls()" type="button">Check controls status</button>
<script>
var x = document.getElementById("myAudio");
function enableControls() { 
  x.controls = true;
  x.load();
} 
function disableControls() { 
  x.controls = false;
  x.load();
} 
 
function checkControls() { 
  alert(x.controls);
} 
</script> 
</body> 
</html>