<!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>div田字格</title>
<style>
#1
{ height:200px;
}
#2
{ height:200px;
}
#11
{
width:49%;
height:200px;
float:left;
background:yellow;
}
#12
{
width:49%;
height:200px;
float:right;
background:blue;
}
#21
{
width:49%;
height:200px;
float:left;
background:black;
}
#22
{
width:49%;
height:200px;
float:right;
background:grey;
}
</style>
</head>
<body>
<div id="1">
<div id="11"> </div>
<div id="12"></div>
</div>
<div id="2">
<div id="21"></div>
<div id="22"></div>
</div>
</body>
</html>
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