（本文来源于图老师网站，更多请访问https://m.tulaoshi.com/webkaifa/） 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Opera Firefox Safari。
不过hack太多，不是很喜欢这样做。
全部代码如下：
？xml version="1.0" encoding="gb2312"？
!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
html xmlns="http://www.w3.org/1999/xhtml" lang="zh-CN"
head
meta http-equiv="Content-Type" content="text/html; charset=gb2312" /
meta http-equiv="Content-Language" content="zh-CN" /
meta content="all" name="robots" /
title3 column lauput/title
style type="text/css" media="screen"
!--
/*![CDATA[*/
/*-----------------------------------------------------------
@from:http://www.alistapart.com/articles/holygrail
@modify:greengnn 08-01-02
------------------------------------------------------------*/
* {
margin:0;
padding:0;
}
body {
min-width: 550px;
font:normal normal normal 75%/1.25em Verdana, 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;
}
/*IE7 hack*/
*+html #center {
position:static;
}
*+html #left {
position:static;
}
*+html #right {
position:static;
}
*+html #container {
position:relative;
overflow:hidden;
}
*+html #left {
position:relative;
}
/*End IE7 hack*/
/*Start Hack for Opera8*/
/**/
#container #center, #container #left, #container #right {
padding-bottom: 32767px !important;
margin-bottom: -32767px !important;
}
@media all and (min-width: 0px) {
#container #center, #container #left, #container #right {
padding-bottom: 0 !important;
margin-bottom: 0 !important;
}
#center:before, #left:before, #right:before {
content: '[DO NOT LEAVE IT IS NOT REAL]';
display: block;
background: inherit;
padding-top: 32767px !important;
margin-bottom: -32767px !important;
height: 0;
}
}
/**/
/*End Hack for Opera8*/
/*just to see*/
#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
div id="header"header(test in IE5.5+ opera9.0 Firefox 2.0)/div
div id="container"
div id="center"
h2Abstract/h2
pThe web is constantly evolving. New and innovative websites are being created every day, pushing the boundaries of HTML in every direction. HTML 4 has been around for nearly a decade now, and publishers seeking new techniques to provide enhanced functionality are being held back by the constraints of the language and browsers./p
pTo give authors more flexibility and interoperability, and enable more interactive and exciting websites and applications, HTML 5 introduces and enhances a wide range of features including form controls, APIs, multimedia, structure, and semantics./p
pWork on HTML 5, which commenced in 2004, is currently being carried out in a joint effort between the a href="http://www.w3.org/html/"abbr title="W3C HTML Working Group"W3C HTML WG/abbr/a and the a href="http://www.whatwg.org/"abbr title="Web Hypertext Application Technology Working Group"WHATWG/abbr/a. Many key players are participating in the W3C effort including representatives from the four major browser vendors: Apple, Mozilla, Opera, and Microsoft; and a range of other organisations and individuals with many diverse interests and expertise./p
pNote that a href="http://www.w3.org/html/wg/html5/"the specification/a is still a emwork in progress/em and quite a long way from completion. As such, it is possible that any feature discussed in this article may change in the future. This article is intended to provide a brief introduction to some of the major features as they are in the current draft./p
/div
div id="left"
h2Abstract/h2
pThe web is constantly evolving. New and innovative websites are being created every day, pushing the boundaries of HTML in every direction. HTML 4 has been around for nearly a decade now, and publishers seeking new techniques to provide enhanced functionality are being held back by the constraints of the language and browsers./p
pTo give authors more flexibility and interoperability, and enable more interactive and exciting websites and applications, HTML 5 introduces and enhances a wide range of features including form controls, APIs, multimedia, structure, and semantics./p
pWork on HTML 5, which commenced in 2004, is currently being carried out in a joint effort between the a href="http://www.w3.org/html/"abbr title="W3C HTML Working Group"W3C HTML WG/abbr/a and the a href="http://www.whatwg.org/"abbr title="Web Hypertext Application Technology Working Group"WHATWG/abbr/a. Many key players are participating in the W3C effort including representatives from the four major browser vendors: Apple, Mozilla, Opera, and Microsoft; and a range of other organisations and individuals with many diverse interests and expertise./p
pNote that a href="http://www.w3.org/html/wg/html5/"the specification/a is still a emwork in progress/em and quite a long way from completion. As such, it is possible that any feature discussed in this article may change in the future. This article is intended to provide a brief introduction to some of the major features as they are in the current draft./p
/div
div id="right"
h2Abstract/h2
pThe web is constantly evolving. New and innovative websites are being created every day, pushing the boundaries of HTML in every direction. HTML 4 has been around for nearly a decade now, and publishers seeking new techniques to provide enhanced functionality are being held back by the constraints of the language and browsers./p
pTo give authors more flexibility and interoperability, and enable more interactive and exciting websites and applications, HTML 5 introduces and enhances a wide range of features including form controls, APIs, multimedia, structure, and semantics./p
pWork on HTML 5, which commenced in 2004, is currently being carried out in a joint effort between the a href="http://www.w3.org/html/"abbr title="W3C HTML Working Group"W3C HTML WG/abbr/a and the a href="http://www.whatwg.org/"abbr title="Web Hypertext Application Technology Working Group"WHATWG/abbr/a. Many key players are participating in the W3C effort including representatives from the four major browser vendors: Apple, Mozilla, Opera, and Microsoft; and a range of other organisations and individuals with many diverse interests and expertise./p
pNote that a href="http://www.w3.org/html/wg/html5/"the specification/a is still a emwork in progress/em and quite a long way from completion. As such, it is possible that any feature discussed in this article may change in the future. This article is intended to provide a brief introduction to some of the major features as they are in the current draft./p
/div
/div
div id="footer"footer/div
script src="http://www.google-analytics.com/urchin.js" type="text/javascript"/script
script type="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 ]
