JavaScript - 选项卡 --优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_41170223/article/details/78780609

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style media="screen">
        ul,ol {
            list-style: none;
        }
        .tabs li {
            float: left;
            width: 98px;
            height: 48px;
            border: 1px solid #333;
            background-color: aqua;
        }
        .tabs li.active {
            background-color: lightblue;
        }
        .panels li {
            width: 298px;
            height: 250px;
            border: 1px solid #333;
            display: none;   /* 隐藏全部页面 */
        }
        .panels li.cur {
            display: block;   /* 显示带"cur"的一页 */
        }
    </style>
</head>
<body>
    <div class="news_center">
        <ol class="tabs" id="tabs">
            <li class="active">热点</li>
            <li>时政</li>
            <li>财经</li>
        </ol>
        <ul class="panels" id="panels">
            <li class="cur">热点</li>
            <li>时政</li>
            <li>财经</li>
        </ul>
    </div>
    <script type="text/javascript">
        window.onload = function () {
            //获取元素
            var aTabs = document.getElementById('tabs').getElementsByTagName('li');
            var aPanels = document.getElementById('panels').getElementsByTagName('li');

            for (var i = 0; i < aTabs.length; i++) {
                aTabs[i].index = i;// 提前将序号保存在index(索引值)属性中
                aTabs[i].onclick = function () {
                    for (var i = 0; i < aTabs.length; i++) { //恢复每一个"aTabs"和"aPanels"の旧样式
                        aTabs[i].className = '';
                        aPanels[i].className = '';
                    }
                    this.className = 'active';        //添加当前选中"aTabs"和"aPanels"の新样式
                    aPanels[this.index].className = 'cur';
                }
            }
        }
    </script>
</body>
</html>