Tryit Editor v2.7

Edit This Code:
<!DOCTYPE html> 
<html> 
<body> 

<audio controls ondurationchange="myFunction()">
  <source src="horse.ogg" type="audio/ogg">
  <source src="horse.mp3" type="audio/mpeg">
  Your browser does not support the audio element.
</audio>

<script>
function myFunction() {
    alert("The audio duration has changed");
}
</script>

</body> 
</html>