<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>作业1227</title>
<style type="text/css">
.btn{
display: block;
width: 42px;
height: 30px;
background-image: url(img/1.jpg);
background-repeat: no-repe#;
background-position: -10px -339px;
}
.btn:hover{
background-position: -60px -339px;
}
.btn:active{
background-position: -125px -339px;
}
</style>
</head>
<body>
<a href="#" class="btn"></a>
</body>
</html>
