原始tab栏切换 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        .box{
            height: 300px;
            width: 400px;
            border:1px solid #000;
            margin: 100px auto;
        }
        .mt span{
            display: inline-block;
            width: 93px;
            height: 50px;
            border: 1px solid #333;
            text-align: center;
            line-height: 50px;
            background: #ff3;
        }
        .mt span.current{
            background: purple;
        }
        ul li{
            list-style: none;
            float: left;
            width: 400px;
            height: 250px;
            border: 1px solid #e0e0e0;
            display: none;
            background: purple;
        }
        ul li.show{
            display: block;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="mt">
            <span class="current">新闻</span>
            <span>体育</span>
            <span>娱乐</span>
            <span>八卦</span>
        </div>
        <div class="mb">
            <ul>
                <li class="show">新闻模块</li>
                <li>体育模块</li>
                <li>娱乐模块</li>
                <li>八卦模块</li>
            </ul>
        </div>
    </div>
</body>
</html>
<script>
    window.onload=function () {
        var spans=document.getElementsByTagName('span');
        var lis=document.getElementsByTagName('li');
        for(var i=0;i<spans.length;i++){
            // 得到span的索引
            spans[i].index=i;
            spans[i].onmouseover=function () {
                for(var j=0;j<spans.length;j++){
                    spans[j].className=' ';
                    lis[j].className=' ';
                }
                this.className='current';
                lis[this.index].className='show';
            }
        }
    }
</script>

 

posted @ 2017-12-28 22:21  前端极客  阅读(290)  评论(0)  编辑  收藏  举报