三列等高CSS布局的一个实例，
修改国外的一个demo，
兼容到了IE5.5 和标准的浏览器OperaFirefoxSafari。
不过hack太多，不是很喜欢这样做。
全部代码如下：
<?xmlversion="1.0"encoding="gb2312"?>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml"lang="zh-CN">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=gb2312"/>
<metahttp-equiv="Content-Language"content="zh-CN"/>
<metacontent="all"name="robots"/>
<title>3columnlauput</title>
<styletype="text/css"media="screen">
<!--
/*<![CDATA[*/
/*-----------------------------------------------------------
@from:http://www.alistapart.com/articles/holygrail
@modify:greengnn08-01-02
------------------------------------------------------------*/
*{
margin:0;
padding:0;
}
body{
min-width:550px;
font:normalnormalnormal75%/1.25emVerdana,Arial,Helvetica,sans-serif;
color:#333333;
text-align:left;
}
/*layout*/
#container{
padding-left:200px;
padding-right:150px;
background:#000;
zoom:1;
}
#container:after{
content:'.';
display:block;
height:0;
clear:both;
visibility:hidden;
}
#container{display:inline-block;}
/*\*/
#container{display:block;}
/*\*/
#center,#left,#right{
position:relative;
float:left;
}
* html#center{
}
#center{width:100%;}
#left{
width:200px;
right:200px;
margin-left:-100%;
}
#right{
width:150px;
margin-right:-150px;
}
#footer{clear:both;}
/*Equal-height*/
#container{overflow:hidden;}
#footer{
overflow:hidden;
position:relative;
}
/*IE7hack*/
* html#center{
position:static;
}
* html#left{
position:static;
}
* html#right{
position:static;
}
* html#container{
position:relative;
overflow:hidden;
}
* html#left{
position:relative;
}
/*EndIE7hack*/
/*StartHackforOpera8*/
/*\*/
#container#center,#container#left,#container#right{
padding-bottom:32767px!important;
margin-bottom:-32767px!important;
}
@mediaalland(min-width:0px){
#container#center,#container#left,#container#right{
padding-bottom:0!important;
margin-bottom:0!important;
}
#center:before,#left:before,#right:before{
content:'[DONOTLEAVEITISNOTREAL]';
display:block;
background:inherit;
padding-top:32767px!important;
margin-bottom:-32767px!important;
height:0;
}
}
/**/
/*EndHackforOpera8*/
/*justtosee*/
#header,#footer{
font-size:40px;
line-height:40px;
text-align:center;
font-weight:bold;
color:#cccccc;
background:#666666;
}
#center{background:#eeeeee;}
#left{background:#FF9933;}
#right{background:#0099CC;}
/*]]>*/
-->
</style>
</head>
<body>
<divid="header">header(testinIE5.5 opera9.0Firefox2.0)</div>
<divid="container">
<divid="center">
<h2>Abstract</h2>
<p>Thewebisconstantlyevolving.Newandinnovativewebsitesarebeingcreatedeveryday,pushingtheboundariesofHTMLineverydirection.HTML4hasbeenaroundfornearlyadecadenow,andpublishersseekingnewtechniquestoprovideenhancedfunctionalityarebeingheldbackbytheconstraintsofthelanguageandbrowsers.</p>
<p>Togiveauthorsmoreflexibilityandinteroperability,andenablemoreinteractiveandexcitingwebsitesandapplications,HTML5introducesandenhancesawiderangeoffeaturesincludingformcontrols,APIs,multimedia,structure,andsemantics.</p>
<p>WorkonHTML5,whichcommencedin2004,iscurrentlybeingcarriedoutinajointeffortbetweenthe<ahref="http://www.w3.org/html/"><abbrtitle="W3CHTMLWorkingGroup">W3CHTMLWG</abbr></a>andthe<ahref="http://www.whatwg.org/"><abbrtitle="WebHypertextApplicationTechnologyWorkingGroup">WHATWG</abbr></a>.ManykeyplayersareparticipatingintheW3Ceffortincludingrepresentativesfromthefourmajorbrowservendors:Apple,Mozilla,Opera,andMicrosoft;andarangeofotherorganisationsandindividualswithmanydiverseinterestsandexpertise.</p>
<p>Notethat<ahref="http://www.w3.org/html/wg/html5/">thespecification</a>isstilla<em>workinprogress</em>andquitealongwayfromcompletion.Assuch,itispossiblethatanyfeaturediscussedinthisarticlemaychangeinthefuture.Thisarticleisintendedtoprovideabriefintroductiontosomeofthemajorfeaturesastheyareinthecurrentdraft.</p>
</div>
<divid="left">
<h2>Abstract</h2>
<p>Thewebisconstantlyevolving.Newandinnovativewebsitesarebeingcreatedeveryday,pushingtheboundariesofHTMLineverydirection.HTML4hasbeenaroundfornearlyadecadenow,andpublishersseekingnewtechniquestoprovideenhancedfunctionalityarebeingheldbackbytheconstraintsofthelanguageandbrowsers.</p>
<p>Togiveauthorsmoreflexibilityandinteroperability,andenablemoreinteractiveandexcitingwebsitesandapplications,HTML5introducesandenhancesawiderangeoffeaturesincludingformcontrols,APIs,multimedia,structure,andsemantics.</p>
<p>WorkonHTML5,whichcommencedin2004,iscurrentlybeingcarriedoutinajointeffortbetweenthe<ahref="http://www.w3.org/html/"><abbrtitle="W3CHTMLWorkingGroup">W3CHTMLWG</abbr></a>andthe<ahref="http://www.whatwg.org/"><abbrtitle="WebHypertextApplicationTechnologyWorkingGroup">WHATWG</abbr></a>.ManykeyplayersareparticipatingintheW3Ceffortincludingrepresentativesfromthefourmajorbrowservendors:Apple,Mozilla,Opera,andMicrosoft;andarangeofotherorganisationsandindividualswithmanydiverseinterestsandexpertise.</p>
<p>Notethat<ahref="http://www.w3.org/html/wg/html5/">thespecification</a>isstilla<em>workinprogress</em>andquitealongwayfromcompletion.Assuch,itispossiblethatanyfeaturediscussedinthisarticlemaychangeinthefuture.Thisarticleisintendedtoprovideabriefintroductiontosomeofthemajorfeaturesastheyareinthecurrentdraft.</p>
</div>
<divid="right">
<h2>Abstract</h2>
<p>Thewebisconstantlyevolving.Newandinnovativewebsitesarebeingcreatedeveryday,pushingtheboundariesofHTMLineverydirection.HTML4hasbeenaroundfornearlyadecadenow,andpublishersseekingnewtechniquestoprovideenhancedfunctionalityarebeingheldbackbytheconstraintsofthelanguageandbrowsers.</p>
<p>Togiveauthorsmoreflexibilityandinteroperability,andenablemoreinteractiveandexcitingwebsitesandapplications,HTML5introducesandenhancesawiderangeoffeaturesincludingformcontrols,APIs,multimedia,structure,andsemantics.</p>
<p>WorkonHTML5,whichcommencedin2004,iscurrentlybeingcarriedoutinajointeffortbetweenthe<ahref="http://www.w3.org/html/"><abbrtitle="W3CHTMLWorkingGroup">W3CHTMLWG</abbr></a>andthe<ahref="http://www.whatwg.org/"><abbrtitle="WebHypertextApplicationTechnologyWorkingGroup">WHATWG</abbr></a>.ManykeyplayersareparticipatingintheW3Ceffortincludingrepresentativesfromthefourmajorbrowservendors:Apple,Mozilla,Opera,andMicrosoft;andarangeofotherorganisationsandindividualswithmanydiverseinterestsandexpertise.</p>
<p>Notethat<ahref="http://www.w3.org/html/wg/html5/">thespecification</a>isstilla<em>workinprogress</em>andquitealongwayfromcompletion.Assuch,itispossiblethatanyfeaturediscussedinthisarticlemaychangeinthefuture.Thisarticleisintendedtoprovideabriefintroductiontosomeofthemajorfeaturesastheyareinthecurrentdraft.</p>
</div>
</div>
<divid="footer">footer</div>
<scriptsrc="http://www.google-analytics.com/urchin.js"type="text/javascript"></script>
<scripttype="text/javascript">
/*<![CDATA[*/
_uacct="UA-496414-1";
/*]]>*/
</script>
</body>
</html>
查看运行效果：
[ 可先修改部分代码 再运行查看效果 ] 
