<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>当浮动对父元素有影响(父元素装不下子元素或子元素中的内容只有一部分在父元素容器中)</title>
<style type="text/css">
body,div{
margin:0;
padding:0;
}
#header{
height:50px;
width:500px;
background:red;
margin:0 auto;
}
#content{
margin:0 auto;
width:500px;
height:200px;
background:pink;
position:relative;
}
#one{
width:100px;
height:100px;
background:green;
position:absolute;
top:50px;
left:-50px;
}
#two{
width:200px;
height:200px;
background:blue;
float:right;
}
#footer{
width:500px;
height:50px;
background:yellow;
margin:0 auto;
}
.clear:after{
clear:both;
display:block;
visibility:hidden;
height:0;
line-height:0;
content:"";
}
</style>
</head>
<body>
<div id="header">head</div>
<div id="content" class="clear">
<div id="one">1</div>
<div id="two">2</div>
</div>
<div id="footer">foot</div>
</body>
</html>
原文地址：http://1154179272.blog.51cto.com/10217799/1657197
