请老师检查作业♥

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xcn_aaaa

2022-09-30 10:06:02

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        ul {
            list-style: none;
        }
        a {
            text-decoration: none;
        }
        .center-wrap {
            width: 1200px;
            margin: 0 auto;
        }
        .top {
            height: 60px;
            line-height: 60px;
        }
        .logo {
            float: left;
        }
        .logo h1 {
            font-size: 20px;
            font-weight: normal;
        }
        .logo h1 a {
            color: #000;
        }
        .nav {
            float: right;
            position: relative;
        }
        .nav ul {
            float: left;
        }
        .nav ul li {
            float: left;
            margin-right: 25px;
            color: #000;
            font-size: 14px;

        }
        .nav .btn {
            float: left;
            width: 100px;
            height: 35px;
            background-color: #000;
            color: #fff;
            margin-top: 12px;
            line-height: 35px;
            font-size: 14px;
            text-align: center;
            border-radius: 4px;

        }
        .line {
            position: absolute;
            width: 30px;
            height: 3px;
            background-color: #f01400;
            top: 45px;
            left: 0;
            transition: left .3s ease 0s;
        }
        .nav ul .current{
            color: #f01400
        }
    </style>
</head>
<body>
    <div class="top">
        <div class="center-wrap">
            <div class="logo">
                <h1><a href="javascript:;">小慕手机</a></h1>
            </div>
            <div class="nav">
                <ul id = "nav-ul">
                    <li class="current">首页</li>
                    <li>外观</li>
                    <li>配置</li>
                    <li>型号</li>
                    <li>说明</li>
                </ul>
                <a href="javascript:;" class="btn">立即购买
                </a>
                <div class="line" id = "line"></div>
            </div>
        </div>
    </div>
    <script>
        var navUl = document.getElementById('nav-ul');
        var lis = navUl.getElementsByTagName('li');
        var line = document.getElementById('line');
        navUl.onmouseover = function(e){
            if(e.target.tagName.toLowerCase() == 'li'){
                // 排他操作
                for(var i = 0;i<lis.length;i++){
                    lis[i].className = '';
                    if(e.target == lis[i]){
                        line.style.left = i * 53 + 'px';
                    }
                   
                }
                e.target.className = 'current';
            }
        }
    </script>
</body>
</html>

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