51help TIY
码：
<html> <head> <script type="text/javascript"> function changeList() { document.getElementById("ul1").style.listStyleType="square"; } </script> </head> <body> <ul id="ul1"> <li>Coffee</li> <li>Tea</li> <li>Water</li> <li>Soda</li> </ul> <input type="button" onclick="changeList()" value="Change list-item marker type" /> </body> </html>
查看结果: