css浮动布局
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>浮动</title>
<style>
.q{
width:172px;
height:20px;
}
.w{
width:40px;
height:20px;
background-color:pink;
float:left;
text-align:center;
margin-left:3px;
}
</style>
</head>
<body>
<div class="q">
<div class="w">1</div>
<div class="w">2</div>
<div class="w">3</div>
<div class="w">4</div>
</div>
</body>
</html>