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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> </head> <body> <ol id="myOl"> <li>Coffee</li> <li>Tea</li> <li>Milk</li> </ol> <p>点击按钮使用小写罗马数字设置有序列表。</p> <button onclick="myFunction()">尝试一下</button> <script> function myFunction(){ document.getElementById("myOl").type="i"; } </script> </body> </html>