<!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=utf-8" />
<title>无标题文档</title>
<style type="text/css">
*
{
margin:0px;
padding:0px;}
.a
{
width:150px;
height:300px;
border:1px solid #F00;}
</style>
</head>
<body>
<!--float 只需要确定左右，他就会靠左右边出现，同时建立多个，默认占满第一行后自动换行-->
<div class="a" style="float:left">A</div>
<div class="a" style="float:right">B</div>
<div class="a" style="float:left">C</div>
<div class="a" style="float:right">D</div>
<div class="a" style="float:left">E</div>
<div class="a" style="float:right">F</div>
</body>
</html>
