<html>
<body>
<ol id="myOl" type="I">
<li>Coffee</li>
<li>Tea</li>
<li>Milk</li>
</ol>
<p>Click the button to set the start value of the ordered list to "5".</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
document.getElementById("myOl").start = "5";
}
</script>
</body>
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</html>