<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
div{
background-repeat:no-repeat;
background-size: 100% 100%;
float:left;
width:2rem;
height:2rem;
margin-right:1rem;
}
.one{
background-image:url("../images/statistic.png");
}
.one.active{
background-image:url("../images/statistic-c.png")
}
.two{
background-image:url("../images/recommend.png")
}
.two.active{
background-image:url("../images/recommend-c.png")
}
.three{
background-image:url("../images/reward.png")
}
.three.active{
background-image:url("../images/reward-c.png")
}
</style>
</head>
<body>
<div class="one active"></div>
<div class="two"></div>
<div class="three"></div>
</body>
<script type="text/javascript" src="../js/jquery-1.7.2.js"></script>
<script>
$("div").click(function(){
$(this).addClass("active");
$(this).siblings().removeClass("active")
})
</script>
</html>
原文：http://www.cnblogs.com/youaremysunshine/p/5153699.html