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在XHTML标签中有一些标签的作用是相似的，当然这里的相似是指语义相似，以至于很多人都不清楚这些相似的标签如何使用，那么今天的主题就是分解相似的标签，明确各个标签的用途。在前面我们已经讲过了strong与em的>>>详细阅读
本文标题：CSS实例:三列等高布局
地址：http://www.17bianji.com/kaifa2/CSS/17465.html
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CSS实例:三列等高布局
作者： 来源：www.28hudong.com 2012-11-19 22:59:11 阅读次 我要评论
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：
<?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" />
<title>3 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">
<h2>Abstract</h2>
<p>The 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>
<p>To 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>
<p>Work 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>
<p>Note that <a href="http://www.w3.org/html/wg/html5/">the specification</a> is still a <em>work 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">
<h2>Abstract</h2>
<p>The 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>
<p>To 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>
<p>Work 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>
<p>Note that <a href="http://www.w3.org/html/wg/html5/">the specification</a> is still a <em>work 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">
<h2>Abstract</h2>
<p>The 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>
<p>To 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>
<p>Work 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>
<p>Note that <a href="http://www.w3.org/html/wg/html5/">the specification</a> is still a <em>work 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> [ 可先修改部分代码 再运行查看效果 ]
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