不确定为什么图像不会居中：
http://jsfiddle.net/xtian/BEXDG/
<div class="topic-tracker-info">
<div class="container">
<ul>
<li>
<a href="#">
<div class="container-topic">
<img src="http://demo.omnigon.com/christian_bovine/snmobile/img/topic-1.jpg" alt="">
<p>2011 NFL DRAFT</p>
</div>
</a>
</li>
<li class="mid">
<a href="#">
<img src="http://demo.omnigon.com/christian_bovine/snmobile/img/topic-2.jpg" alt="">
<p>NFL Labor Dispute</p>
</a>
</li>
<li>
<a href="#">
<img src="http://demo.omnigon.com/christian_bovine/snmobile/img/topic-3.jpg" alt="">
<p>NHL TRADE DEADLINE</p>
</a>
</li>
</ul>
<div class="trend-nav">
<a class="prev" href="#">PREVIOUS</a>
<a href="#" class="pages"><b>LATEST</b></a>
<a href="#" class="next">NEXT</a>
</div>
</div>
</div>
.container{margin: 0 auto;width:90%;padding:0;overflow: hidden;}
.container-center{margin: 0 auto;width:299px;padding:0;overflow: hidden;}
.container-topic{width:100%; margin:0 auto;}
.topic-tracker {float:left; width:100%; border-top:4px solid #000;background-color: #a80500;}
.topic-tracker.nfl{background-color:#005496;}
.topic-tracker.mlb{background-color:#cc9866;}
.topic-tracker h2{background:transparent url(img/sn-logo.png) no-repeat 0 5px; font-size:12px; color:#fff; font-style: italic;padding: 3px 0 3px 16px; margin-bottom:1px;}
.topic-tracker-info{float:left;width:100%;height:140px;background:transparent url(img/topic-bg.gif) repeat-x 0 0; }
.topic-tracker-info ul{float:left;width:100%;padding:5px 0 0 0;}
.topic-tracker-info ul li{float:left;width:30%;text-align:center;margin: 0 auto;}
.topic-tracker-info ul li a{font-size:12px; font-weight: bold; color:#000;line-height: 1.1;margin:0 auto;}
.topic-tracker-info ul li.mid{margin:0 8px;}
.topic-tracker-info ul li img{float:left;width:93px;margin:0 0 2px 0;clear:right;margin: 0 auto;}
.topic-tracker-info ul li p{clear:both;}
.trend-nav{float:left;margin-top:10px;width:100%;}
.trend-nav a{float:left; color:#4e4e4e; font-size: 11px; font-weight: bold;}
.trend-nav a.prev{width:40%;float:left;text-align: left;padding-left:13px;background: transparent url(img/arrow-prev.png) no-repeat 0 1px;}
.trend-nav a.next{width:18%;float:right;text-align: right;padding-right:13px;background: transparent url(img/arrow-next.png) no-repeat right 1px;}
.trend-nav p.pages, #wrapper .trend-nav a.pages{float:left;width:20%;height:16px;margin:0 auto;padding-top:2px;background:transparent url(img/pages_bg.png) no-repeat center center; text-align:center;font-size:10px; color:#000;font-weight: normal;}
答案 0 :(得分：3)
尝试从图像中删除float：left：
.topic-tracker-info ul li img{width:93px;margin:0 0 2px 0;clear:right;margin: 0 auto;}
这使我的图像居中。
答案 1 :(得分：0)
试试这个：http://jsfiddle.net/BEXDG/5/
// HTML:
<div class="topic-tracker-info">
<div class="container">
<ul>
<li>
<a href="#">
<div class="container-topic">
<img src="http://demo.omnigon.com/christian_bovine/snmobile/img/topic-1.jpg" alt="">
<p>2011 NFL DRAFT</p>
</div>
</a>
</li>
<li class="mid">
<a href="#">
<img src="http://demo.omnigon.com/christian_bovine/snmobile/img/topic-2.jpg" alt="">
<p>NFL Labor Dispute</p>
</a>
</li>
<li>
<a href="#">
<img src="http://demo.omnigon.com/christian_bovine/snmobile/img/topic-3.jpg" alt="">
<p>NHL TRADE DEADLINE</p>
</a>
</li>
</ul>
<div class="trend-nav">
<a class="prev" href="#">PREVIOUS</a>
<a href="#" class="pages"><b>LATEST</b></a>
<a href="#" class="next">NEXT</a>
</div>
</div>
</div>
// CSS:
.container{margin: 0 auto;width:90%;padding:0;overflow: hidden;}
.container-center{margin: 0 auto;width:299px;padding:0;overflow: hidden;}
.container-topic{width:100%; margin:0 auto;}
.topic-tracker { float:left; width:100%; border-top:4px solid #000;background-color: #a80500}
.topic-tracker.nfl{background-color:#005496;}
.topic-tracker.mlb{background-color:#cc9866;}
.topic-tracker h2{background:transparent url(img/sn-logo.png) no-repeat 0 5px; font-size:12px; color:#fff; font-style: italic;padding: 3px 0 3px 16px; margin-bottom:1px;}
.topic-tracker-info{width:100%;height:140px;background:transparent url(img/topic-bg.gif) repeat-x 0 0; margin-left:auto; margin-right:auto;}
.topic-tracker-info ul{float:left;width:100%;padding:5px 0 0 0;}
.topic-tracker-info ul li{float:left;width:30%;text-align:center;margin: 0 auto;}
.topic-tracker-info ul li a{font-size:12px; font-weight: bold; color:#000;line-height: 1.1;margin:0 auto;}
.topic-tracker-info ul li.mid{margin:0 8px;}
.topic-tracker-info ul li img{width:93px;margin:0 0 2px 0;clear:right;;margin: 0 auto;}
.topic-tracker-info ul li p{clear:both;}
.trend-nav{float:left;margin-top:10px;width:100%;}
.trend-nav a{float:left; color:#4e4e4e; font-size: 11px; font-weight: bold;}
.trend-nav a.prev{width:40%;float:left;text-align: left;padding-left:13px;background: transparent url(img/arrow-prev.png) no-repeat 0 1px;}
.trend-nav a.next{width:18%;float:right;text-align: right;padding-right:13px;background: transparent url(img/arrow-next.png) no-repeat right 1px;}
.trend-nav p.pages, #wrapper .trend-nav a.pages{float:left;width:20%;height:16px;margin:0 auto;padding-top:2px;background:transparent url(img/pages_bg.png) no-repeat center center; text-align:center;font-size:10px; color:#000;font-weight: normal;}
答案 2 :(得分：0)
因为你有
.topic-tracker-info ul li img {
float:left;
}
删除此属性后，或使用float：none覆盖它，您还应该添加text-align：center;到你的div.container-topic
答案 3 :(得分：0)
这应该是您需要的所有CSS：
.topic-tracker-info { font-size:10px; }
.topic-tracker-info ul { overflow:hidden; }
.topic-tracker-info ul li { float:left; margin-right:10px; padding-right:10px; width:125px; }
.topic-tracker-info li a { display:block; text-align:center; }
概述：