js案例-4 经典tab栏切换

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<!DOCTYPE html><html><head lang="en">    <meta charset="UTF-8">    <title></title>    <style>        * {            padding: 0;            margin: 0;        }        .box {            width: 500px;            height: 400px;            border: 1px solid #ccc;            margin: 100px auto;            overflow: hidden;        }        ul {            width: 600px;            height: 40px;            margin-left: -1px;            list-style: none;        }        li {            float: left;            width: 101px;            height: 40px;            text-align: center;            font: 600 18px/40px "simsun";            background-color: pink;            cursor: pointer;        }        span {            display: none;            width: 500px;            height: 360px;            background-color: yellow;            text-align: center;            font: 700 150px/360px "simsun";        }        .show {            display: block;        }        .current {            background-color: yellow;        }    </style>    <script>        window.onload = function () {            var boxArr = document.getElementsByClassName("box");            for(var i=0;i<boxArr.length;i++){                fn(boxArr[i]);            }            function fn(ele){                var liArr = ele.getElementsByTagName("li");                var spanArr = ele.getElementsByTagName("span");                for(var i=0;i<liArr.length;i++){                    liArr[i].index = i;                    liArr[i].onmouseover = function () {                        for(var j=0;j<liArr.length;j++){                            liArr[j].className = "";                            spanArr[j].className = "";                        }                        this.className = "current";                        spanArr[this.index].className = "show";                    }                }            }        }    </script></head><body>    <div class="box">        <ul>            <li class="current">鞋子</li>            <li>袜子</li>            <li>帽子</li>            <li>裤子</li>            <li>裙子</li>        </ul>        <span class="show">鞋子</span>        <span>袜子</span>        <span>帽子</span>        <span>裤子</span>        <span>裙子</span>    </div>    <div class="box">        <ul>            <li class="current">鞋子</li>            <li>袜子</li>            <li>帽子</li>            <li>裤子</li>            <li>裙子</li>        </ul>        <span class="show">鞋子</span>        <span>袜子</span>        <span>帽子</span>        <span>裤子</span>        <span>裙子</span>    </div>    <div class="box">        <ul>            <li class="current">鞋子</li>            <li>袜子</li>            <li>帽子</li>            <li>裤子</li>            <li>裙子</li>        </ul>        <span class="show">鞋子</span>        <span>袜子</span>        <span>帽子</span>        <span>裤子</span>        <span>裙子</span>    </div></body></html>
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