利用 CSS 來(lái)實(shí)現(xiàn)對(duì)象的垂直居中有許多不同的方法，比較難的是選擇那個(gè)正確的方法。我下面說(shuō)明一下我看到的好的方法和怎么來(lái)創(chuàng)建一個(gè)好的居中網(wǎng)站。
哪個(gè)方法？
我最喜歡的是方法三，缺點(diǎn)不多。因?yàn)?content 會(huì)清除浮動(dòng)，所以可以在它上面放置別的元素，并且當(dāng)窗口縮放時(shí)，
居中的 content 不會(huì)把另外的元素蓋住?？?例子。
<div id="top">
<h1>Title</h1>
</div>
<div id="content">
Content Here</div>
#floater{float:left; height:50%; margin-bottom:-120px;}
#top{float:right; width:100%; text-align:center;}
#content{clear:both; height:240px; position:relative;}
現(xiàn)在你知道是怎么回事了，現(xiàn)在我們開始創(chuàng)建一個(gè)簡(jiǎn)單但是有趣的網(wǎng)站。最終的樣子是這樣的：

步驟一
以語(yǔ)義化標(biāo)簽開始是很好的。下面是我們的頁(yè)面構(gòu)成：
#floater/*把 content 置中*/
#contred/*centre 盒*/
#side
#logo
#nav/*無(wú)序列表*/
#content
#bottom/*放置版權(quán)等*/
這是我用到的 xhtml 代碼：
A Centred Company
<div id="centered">
<div id="side">
<div id="logo">
<strong><span>A</span> Company</strong></div>
<ul id="nav">
<li><a href="#">Home</a></li>
<li><a href="#">Products</a></li>
<li><a href="#">Blog</a></li>
<li><a href="#">Contact</a></li>
<li><a href="#">About</a></li>
</ul>
</div>
<div id="content">
<h1>Page Title</h1>
Holisticly re-engineer value-added outsourcing after process-centric collaboration and idea-sharing.
Energistically simplify impactful niche markets via enabled imperatives.
Holisticly predominate premium innovation after compelling scenarios.
Seamlessly recaptiualize high standards in human capital with leading-edge manufactured products.
Distinctively syndicate standards compliant schemas before robust vortals.
Uniquely recaptiualize leveraged web-readiness vis-a-vis out-of-the-box information.
<h2>Heading 2</h2>
Efficiently embrace customized web-readiness rather than customer directed processes.
Assertively grow cross-platform imperatives vis-a-vis proactive technologies.
Conveniently empower multidisciplinary meta-services without enterprise-wide interfaces.
Conveniently streamline competitive strategic theme areas with focused e-markets.
Phosfluorescently syndicate world-class communities vis-a-vis value-added markets.
Appropriately reinvent holistic services before robust e-services.</div>
</div>
<div id="bottom">
Copyright notice goes here</div>

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