<html>
<body>
<ol id="myOl" type="I">
<li>Coffee</li>
<li>Tea</li>
<li>Milk</li>
</ol>
<p>点击按钮设置有序列表的起始值为 "5"。</p>
<button onclick="myFunction()">尝试一下</button>
<script>
function myFunction()
{
document.getElementById("myOl").start="5";
}
</script>
</body>
</html>