<html><body><ul id="myList"> <li>咖啡</li> <li>茶</li> <li>纯水</li> <li>苏打水</li></ul><button type="button" onclick="myFunction()">改变列表项标记</button> <script>function myFunction() { document.getElementById("myList").style.listStyleImage = "url('/i/pic/sqpurple.gif')";}</script></body></html>