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我们使用固定层来设计一个三栏网页，以下是CSS代码：
<style type="text/css">
<!--
#header {
background: #0f0;
position: absolute;
top: 0px;
left: 0px;
width: 800px;
height: 100px;
}
#leftcol {
background: #f00;
position: absolute;
top: 100px;
left: 0px;
width: 150px;
height: 500px;
}
#rightcol {
background: #f00;
position: absolute;
top: 100px;
left: 650px;
width: 150px;
height: 500px;
}
#content {
background: #fff;
position: absolute;
top: 100px;
left: 150px;
width: 500px;
height: 500px;
}
#footer {
background: #0f0;
position: absolute;
top: 500px;
left: 0px;
width: 800px;
height: 100px;
}
-->
</style>
（爱上你的微笑：http://hi.baidu.com/loveyoursmile/）
HTML代码：
<div id="header">Header Section</div>
<div id="leftcol">Left Section</div>
<div id="content">Content Section</div>
<div id="rightcol">Right Section</div>
<div id="footer">Footer Section</div>
（爱上你的微笑：http://hi.baidu.com/loveyoursmile/）
完整代码：
<html>
<head>
<title>THREE-COLUMN FIXED LAYOUT WITH FIXED BOXES</title>
<style type="text/css">
<!--
#header {
background: #0f0;
position: absolute;
top: 0px;
left: 0px;
width: 800px;
height: 100px;
}
#leftcol {
background: #f00;
position: absolute;
top: 100px;
left: 0px;
width: 150px;
height: 500px;
}
#rightcol {
background: #f00;
position: absolute;
left: 650px;
top: 100px;
width: 150px;
height: 500px;
}
#content {
background: #fff;
position: absolute;
top: 100px;
left: 150px;
width: 500px;
height: 500px;
}
#footer {
background: #0f0;
position: absolute;
top: 500px;
left: 0px;
width: 800px;
height: 100px;
}
-->
</style>
</head>
<body>
<div id="header">Header Section</div>
<div id="leftcol">Left Section</div>
<div id="content">Content Section</div>
<div id="rightcol">Right Section</div>
<div id="footer">Footer Section</div>
</body>
</html>
效果图：
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