【发布时间】：2009-12-05 21:30:36
【问题描述】：
我创建了一个布局，所有内容都居中（使用“margin =“0 auto”技术）。我还希望页眉和页脚为黑色，并在浏览器放大到两侧时扩展到两侧。如果我居中黑色背景的所有内容也将居中，并且不会无限扩展。我发现的唯一解决方案是将背景样式应用于页眉和页脚，并使用其中的一个类（.container）来居中内容（我认为 Stack Overflow 使用了这个页脚技术）。很好，但我想知道是否有更好的方法而不是添加额外的 div？
我的 HTML：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>globo design</title>
<link href="styles/layout.css" rel="stylesheet" type="text/css" />
<link href="styles/slideshow.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script type="text/javascript" src="scripts/slideshow.js"></script>
</head>
<body id="home">
<!-- header -->
<div id="header">
<div class="container">
<h1><a href="http://widerdesign.co.nr/">wider design</a></h1>
<!-- navigation -->
<ul id="navigation">
<li class="home"><a href="index.php"><span>home</span></a></li>
<li class="portfolio"><a href="portfolio.php"><span>portfolio</span></a></li>
<li class="about"><a href="about.php"><span>about</span></a></li>
<li class="contact"><a href="contact.php"><span>contact</span></a></li>
</ul>
</div>
</div>
<!-- content -->
<div id="content">
<div id="top-column">
<p>We <strong>design and develop</strong> clean and effective webs in the <strong>top 3 languages</strong>
on the Internet. Internet is mean to reach the whole world.You are mean to reach the whole audience:</p>
</div>
<div id="middle-column">
<h2>Our Work</h2>
<!-- slideshow -->
<div id="slideshow">
<div id="slidesContainer">
<div class="slide">
Content for slide 1 goes here
</div>
<div class="slide">
Content for slide 2 goes here
</div>
<div class="slide">
Content for slide 3 goes here
</div>
<div class="slide">
Content for slide 4 goes here
</div>
</div>
</div>
</div>
<div id="left-column">
<h2>Web Design</h2>
<p>Create a web site easily with this online HTML generator. Follow the steps below to create web pages then click "view html page" to test it once it's completed. You can copy and paste generated code where you wish within the generated document(s). For example: You created an HTML table with 3 rows and 3 columns. You then added a link, which appears below the HTML table. If you want the link inside the HTML table, just cut and paste it inside the table in place of an "ADD TEXT" statement. Any where text,images,or links need to be, there will be a generated "ADD TEXT" statement in the HTML pages.</p>
</div>
<div id="right-column">
<h2>Web Translation</h2>
<p>Create a web site easily with this online HTML generator. Follow the steps below to create web pages then click "view html page" to test it once it's completed. You can copy and paste generated code where you wish within the generated document(s). For example: You created an HTML table with 3 rows and 3 columns. You then added a link, which appears below the HTML table. If you want the link inside the HTML table, just cut and paste it inside the table in place of an "ADD TEXT" statement. Any where text,images,or links need to be, there will be a generated "ADD TEXT" statement in the HTML pages.</p>
</div>
</div>
</div>
<!-- footer -->
<div id="footer">
<div class="container">
</div>
</div>
<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
try {
var pageTracker = _gat._getTracker("UA-11932489-1");
pageTracker._trackPageview();
} catch(err) {}</script>
</body>
</html>
我的 CSS：
/* reset */
* {
margin: 0;
padding: 0;
}
/* tags */
body {
background-color: #FFFFFF;
color: #5D5D5D;
font-family: Arial, "MS Trebuchet", sans-serif;
font-size: 75%;
}
h1 {
background: #2D2D2D url(../images/logo.png) no-repeat scroll 0 0;
margin-bottom: 20px;
text-indent: -9999px;
}
h2 {
color: #418EE4;
font-family: Arial;
font-size: 16px;
font-weight: normal;
margin-bottom: 10px;
}
a {
font-family: Arial, "MS Trebuchet", sans-serif;
}
/* classes */
.container {
margin: 0 auto;
width: 960px;
}
/* header */
#header {
background-color: #2D2D2D;
padding-top: 10px;
}
/* navigation */
ul#navigation {
height: 20px;
list-style: none;
margin: 0;
padding: 0;
}
ul#navigation li {
float: left;
}
ul#navigation li a {
background: url(../images/tab.png);
color: #C0C0C0;
display: block;
height: 20px;
outline: none;
padding-left: 10px;
text-decoration: none;
}
ul#navigation li a:hover {
color: #418EE4;
}
#home li.home a, #portfolio li.portfolio a, #about li.about a, #contact li.contact a {
background-position: 0 -32px;
color: #757575;
}
ul#navigation span {
background: url(../images/tab.png) 100% 0;
display: block;
line-height: 20px;
padding-right: 20px;
}
#home li.home span, #portfolio li.portfolio span, #about li.about span, #contact li.contact span {
background-position: 100% -32px;
}
/* content */
#content {
background-color: #FFFFFF;
padding: 20px;
overflow: hidden;
margin: 0 auto;
width: 960px;
}
#content h2 {
border-top: 2px dashed #F0F0F0;
border-bottom: 2px dashed #F0F0F0;
padding: 5px 0 5px 0;
margin: 15px 0 15px 0;
}
#top-column {
color: #818181;
font-size: 16px;
font-family: Arial, "MS Trebuchet", sans-serif;
margin: 10px 0 10px 0;
padding: 10px 0 20px 0;
}
#top-column strong {
font-weight: normal;
color: #3C3C3C;
}
#middle-column {
float: left;
}
#right-column {
float: left;
width: 420px;
}
#left-column {
float: right;
width: 500px;
}
/* footer */
#footer {
clear: both;
background-color: #2D2D2D;
height: 200px;
}
【问题讨论】：
标签： css layout colors background