涉及到的知识点包括 为选择的元素增加序号、过滤选择器、排他思想、动态增加样式等。
代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>tab栏切换</title>
<style type="text/css">
body,div,ul,li,ol,dl,dt,p,dd,img,input,a,span,h1,h2,h3,h4{padding:0; margin:0; border:0; list-style:none;}
.wrapper{width:1000px; height: 475px; margin: 0 auto; margin-top: 100px;}
.tab{ border:1px solid #ddd; border-bottom: 0; height: 36px; width: 320px;}
.tab li{ position: relative; float: left; width: 80px; height: 34px; line-height: 34px; text-align: center; cursor: pointer;
border-top:4px solid #fff;}
.tab span{ position: absolute;right: 0;top:10px;background: #ddd;width: 1px;height: 14px;overflow: hidden; }
.products{ width: 1002px;border:1px solid #ddd;height: 476px;}
.products .main{float: left;display: none;}
.products .main.selected{display: block;}
.tab li.active{border-color: red; border-bottom: 0;}
</style>
<script type="text/javascript" src="../../js/jquery-1.11.1.min.js" ></script>
<script>
$(document).ready(function(){
//alert("wwww");
$(".tab li").mouseenter(function(){
var $this = $(this);
//alert($this);
// 给每个点击的对象添加序列号
index = $this.index();
console.log(index);
// 排他思想 siblings() 返回被选元素的所有的同胞兄弟
$this.addClass("active").siblings().removeClass("active");
$(".products div").eq(index).addClass("selected").siblings().removeClass("selected");
});
});
</script>
</head>
<body>
<div class="wrapper">
<ul class="tab">
<li class="tab-item active">国际大牌<span>◆</span></li>
<li class="tab-item">国妆名牌<span>◆</span></li>
<li class="tab-item">清洁用品<span>◆</span></li>
<li class="tab-item">男士精品</li>
</ul>
<div class="products">
<div class="main selected">
<a href="###"><img src="imgs/guojidapai.jpg" alt=""/></a>
</div>
<div class="main">
<a href="###"><img src="imgs/guozhuangmingpin.jpg" alt=""/></a>
</div>
<div class="main">
<a href="###"><img src="imgs/qingjieyongpin.jpg" alt=""/></a>
</div>
<div class="main">
<a href="###"><img src="imgs/nanshijingpin.jpg" alt=""/></a>
</div>
</div>
</div>
</body>
</html>
效果如下
