<!DOCTYPE html>
<html>
<body>
<p>Click the button to create two SOURCE elements, and append them to the AUDIO element.</p>
<audio controls id="myAudio" autoplay>
Your browser does not support the audio tag.
</audio><br>
<p id="demo"></p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var x = document.createElement("SOURCE");
x.setAttribute("src", "horse.mp3");
x.setAttribute("type", "audio/mpeg");
document.getElementById("myAudio").appendChild(x);
var y = document.createElement("SOURCE");
y.setAttribute("src", "horse.ogg");
y.setAttribute("type", "audio/ogg");
document.getElementById("myAudio").appendChild(y);
document.getElementById("demo").innerHTML = "The audio player now works as it should. Press play to listen to the sound of a horse.";
}
</script>
</body>
</html>