<html>
<title>W3.JS</title>
<script src="https://www.w3schools.com/lib/w3.js"></script>
<body>
<h2>Sort List</h2>
<p>Click the button to sort the list alphabetically:</p>
<button onclick="w3.sortHTML('#id01', 'li')">Sort</button>
<ul id="id01">
<li>Oslo</li>
<li>Stockholm</li>
<li>Helsinki</li>
<li>Berlin</li>
<li>Rome</li>
<li>Madrid</li>
</ul>
</body>
</html>