上图：
上代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
.container{
width: 150px;
height: 30px;
position: relative;
}
.container ul{
margin: 0;
padding: 0;
position: absolute;
list-style: none;
width: 100%;
height: 100%;
overflow: hidden;
}
.container li{
z-index: 1;
width: 20%;
height: 100%;
float: left;
background: #faf;
border-radius: 50%;
/*box-shadow: 2px red inset;*/
}
.container li:hover+span{
display: block;
z-index: 99;
width: 500%;
height: 100%;
float: left;
background: #afa;
}
span.show{
display: block;
z-index: 99;
width: 500%;
height: 100%;
float: left;
background: #afa;
}
.backer{
position: absolute;
width: 100%;
height: 100%;
}
.backer li{
background: #999;
}
</style>
</head>
<body>
<form class="" action="" method="post">
<input type="text" name="star" value="5" style="display:none">
</form>
<div class="container">
<div class="backer">
<ul>
<li ></li>
<li ></li>
<li ></li>
<li ></li>
<li ></li>
</ul>
</div>
<ul>
<li class="li1"></li><span></span>
<li class="li2"></li><span></span>
<li class="li3"></li><span></span>
<li class="li4"></li><span></span>
<li class="li5"></li><span></span>
</ul>
</div>
<div>another div </div>
<script src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js" charset="utf-8"></script>
<script type="text/javascript">
var spans=[];
var form =$("form")
$(".container li").on("click",function(e){
console.log(e.target.className.split("i")[1]);
// form.star.value=e.target.className.split("i")[1];
console.log($("."+e.target.className).next());
$("."+e.target.className).next().addClass("show");
spans=$("span.show");
})
$(".container ul").mouseenter(function(){
if(spans.length>0)spans.removeClass("show");
console.log(spans);
})
$(".container ul").mouseleave(function(){
spans.addClass("show")
})
</script>
</body>
</html>
没了。
PS：大力推荐《CSS揭秘》，一本让人钻牛角尖不亦乐乎的书
