/* 代码整理：时代Java NowJava.com */
*{margin: 0; padding: 0; list-style: none;}
.banimg{width: 600px;height: 200px; margin: 20px auto;}
.banimg li{ width: 200px; height: 200px; float: left; position: relative;}
.banimg li img{ width: 200px; height: 200px; position: absolute; left: 50%;top: 50%;margin: -100px 0 0 -100px;z-index: 1;}