CSS背景图片的定位:
在使用精灵图的时候经常会用到这个属性!!!
关键字:
background-position: top left;
像数:
background-position: 5px 5px;
百分比:
background-position: 0% 0%;
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>homework</title>
<style type="text/css">
.btn{
display: block;
width: 50px;
height: 40px;
background-image: url(image/3.png);
background-repeat: no-repeat;
background-position: 0px -338px;
}
.btn:hover{
background-position: -59px -338px;
}
.btn:active{
background-position: -119px -338px
}
</style>
</head>
<body>
<a href="#" class="btn"></a>
</body>
</html>
