Tryit Editor v2.9

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

<ol id="myList">
  <li>Tea</li>
  <li>Milk</li>
  <li>Water</li>
</ol>

<p>Click the button to create a LI element.</p>

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

<script>
function myFunction() {
    var x = document.createElement("LI");
    var t = document.createTextNode("Coffee");
    x.appendChild(t);
    document.getElementById("myList").appendChild(x);
}
</script>

</body>
</html>