<span style="font-size:14px;"><span style="font-size:14px;"><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>div浮动排版</title>
</head>
<style>
body{
margin:0px 6px 2px 3px;/*上 右 下 左*/
}
#father{
background-color: #ffff99;
width: 100%;
height: 100px;
border:1px dashed green;
}
#son1{
float: left;
}
#son2{
float: left;
}
#son3{
float: left;
}
#clear{
clear:both;
}
</style>
<body>
<div>
<div id="father">
<div id="son1">aaaaaa</div>
<div id="son2">bbbbbb</div>
<div id="son3">cccccc</div>
<div id="clear"></div>
<div id="son4">dddddd</div> <!--son4没有浮动，但受上面影响跟着浮动 -->
</div>
</div>
</body>
</html>
</span></span>
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