DIV+CSS 网页布局之：三列布局_html/css_WEB-ITnose
1、宽度自适应三列布局
三列布局的原理和两列布局的原理是一样的，只不过多了一列，只需给宽度自适应两列布局中间再加一列，然后重新计算三列的宽度，就实现了宽度自适应的三列布局。
同样的道理，更多列的布局，其实和两列、三列的布局模式是一样的。
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="UTF-8"> 5 <title>三列布局</title> 6 <style> 7 *{margin:0;padding:0;} 8 #herder{ 9 height:50px;10 background:blue;11 }12 #main{13 width:100%;14 overflow:hidden;15 }16 #main .main-left{17 width:25%;18 height:800px;19 background:red;20 float:left;21 }22 #main .main-center{23 width:50%;24 height:800px;25 background:lightgreen;26 float:left;27 }28 #main .main-right{29 width:25%;30 height:800px;31 background:pink;32 float:right;33 }34 #footer{35 height:50px;36 background:gray;37 }38 </style>39 </head>40 <body>41 <div id="herder">页头</div>42 <div id="main">43 <div class="main-left">左列</div>44 <div class="main-center">中间</div>45 <div class="main-right">右列</div>46 </div>47 <div id="footer">页脚</div>48 </body>49 </html>2、左右两列固定宽度，中间内容宽度自适应
要想实现左右两列固定宽度，中间宽度自适应的布局，那么使用浮动就做不到了，使用浮动之后页面就乱了，必须使用绝对定位来将三列固定在一行。
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="UTF-8"> 5 <title>两边固定中间自适应布局</title> 6 <style> 7 *{margin:0;padding:0;} 8 #herder{ 9 height:50px;10 background:blue;11 }12 #main{13 width:100%;14 position:relative;15 }16 #main .main-left{17 width:200px;18 height:800px;19 background:red;20 position:absolute;21 left:0;22 top:0;23 }24 #main .main-center{25 height:800px;26 background:lightgreen;27 margin:0 310px 0 210px;28 }29 #main .main-right{30 width:300px;31 height:800px;32 background:pink;33 position:absolute;34 right:0;35 top:0;36 }37 #footer{38 height:50px;39 background:gray;40 }41 </style>42 </head>43 <body>44 <div id="herder">页头</div>45 <div id="main">46 <div class="main-left">左列</div>47 <div class="main-center">设计网页的第一步就是设计版面布局，搭建网站结构，网页排版的合理性，在一定程度上也影响着网站整体的布局以及后期的优化。一个好的网站形象能更容易地吸引用户、留住用户。因此，网站首页第一屏的排版非常重要，很多时候能决定用户的去与留。</div>48 <div class="main-right">右列</div>49 </div>50 <div id="footer">页脚</div>51 </body>52 </html>
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1655
14
1413
52
1306
25
1252
29
1225
24
Is HTML easy to learn for beginners?
Apr 07, 2025 am 12:11 AM
HTML is suitable for beginners because it is simple and easy to learn and can quickly see results. 1) The learning curve of HTML is smooth and easy to get started. 2) Just master the basic tags to start creating web pages. 3) High flexibility and can be used in combination with CSS and JavaScript. 4) Rich learning resources and modern tools support the learning process.
Understanding HTML, CSS, and JavaScript: A Beginner's Guide
Apr 12, 2025 am 12:02 AM
WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.
The Roles of HTML, CSS, and JavaScript: Core Responsibilities
Apr 08, 2025 pm 07:05 PM
HTML defines the web structure, CSS is responsible for style and layout, and JavaScript gives dynamic interaction. The three perform their duties in web development and jointly build a colorful website.
Gitee Pages static website deployment failed: How to troubleshoot and resolve single file 404 errors?
Apr 04, 2025 pm 11:54 PM
GiteePages static website deployment failed: 404 error troubleshooting and resolution when using Gitee...
What is an example of a starting tag in HTML?
Apr 06, 2025 am 12:04 AM
AnexampleofastartingtaginHTMLis,whichbeginsaparagraph.StartingtagsareessentialinHTMLastheyinitiateelements,definetheirtypes,andarecrucialforstructuringwebpagesandconstructingtheDOM.
How to use CSS3 and JavaScript to achieve the effect of scattering and enlarging the surrounding pictures after clicking?
Apr 05, 2025 am 06:15 AM
To achieve the effect of scattering and enlarging the surrounding images after clicking on the image, many web designs need to achieve an interactive effect: click on a certain image to make the surrounding...
HTML, CSS, and JavaScript: Essential Tools for Web Developers
Apr 09, 2025 am 12:12 AM
HTML, CSS and JavaScript are the three pillars of web development. 1. HTML defines the web page structure and uses tags such as, etc. 2. CSS controls the web page style, using selectors and attributes such as color, font-size, etc. 3. JavaScript realizes dynamic effects and interaction, through event monitoring and DOM operations.
How to implement adaptive layout of Y-axis position in web annotation?
Apr 04, 2025 pm 11:30 PM
The Y-axis position adaptive algorithm for web annotation function This article will explore how to implement annotation functions similar to Word documents, especially how to deal with the interval between annotations...
