<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>购物车</title>
<style type="text/css">
.box{
display: block;
width: 51px;
height: 40px;
margin: 500px auto;
background-image: url(img/3.png);
background-repeat: no-repeat;
background-position: 0px -333px;
}
.box:hover{
background-position: -55px -333px;
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>
