效果图如下，欢迎评价：
看代码：
复制代码 代码如下:
html, body, ul, li, h1, h2, h3, h4, h5, h6, fieldset, legend {padding:0; margin:0;}
body {font:12px/normal Verdana, Arial, Helvetica, sans-serif;}
ul,li {list-style-type:none; text-transform:capitalize;}
clear{clear:both;height:0;font-size: 1px;line-height: 0px;}//清除浮动哦
#nav {margin:0 auto 60px; width:1080px; display:block;}
mainlevel {background:#ffe60c; float:left; border-right:1px solid #fff; width:140px;}
mainlevel a {color:#000; text-decoration:none; line-height:32px; display:block; padding:0 20px; width:100px; font-weight:bold;}
mainlevel a:hover {color:#fff; text-decoration:none; background:#062723 0 0; font-weight:bold;}
mainlevel ul {display:none; position:absolute;}
mainlevel li {border-top:1px solid #fff; background:#ffe60c; width:140px;font-weight:bold;}
