<html>
<head>
<title>day03.html</title>
<style type="text/css">
/*首先写一个position的div*/
#car{
width:150px;height:30px;
background: #999999;
color:white;text-align: center;
line-height: 30px;margin: 232px 300px;
border:1px solid black;position: relative;
}
#num{
width:20px;height:20px;background: red;
color:white;text-aligh:center;
line-height:20px;position: absolute;
top:-15px;left:25px;
}
</style>
</head>
<body>
<div id="car">
去购物车付款
<div id="num">0</div>
</div>
</body>
</html>
