lovecoding
/
VIP32


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            list-style: none;
            text-decoration: none;
            box-sizing: border-box;
        }
        #container {
            width: 480px;
            margin: 120px auto;
        }
        #list {
            overflow: hidden;
        }
        #list li {
            float: left;
            width: 120px;
            height: 50px;
            text-align: center;
            line-height: 50px;
            border: 1px solid #ccc;
        }
        .selected {
            background: #f00;
            color: #ff0;
        }
        .main .active {
            width: 480px;
            height: 300px;
            text-align: center;
            line-height: 300px;
            font-size: 30px;
            color: purple;
            border: 1px solid #f00;
            display: none;
        }
        .main .choose {
            display: block;
        }
    </style>
</head>
<body>
    <div id="container">
        <ul id="list">
            <li class="selected">选项一</li>
            <li>选项二</li>
            <li>选项三</li>
            <li>选项四</li>
        </ul>
        <div class="main">
            <div class="active choose">1</div>
            <div class="active">2</div>
            <div class="active">3</div>
            <div class="active">4</div>
        </div>
    </div>
    <script>
        //点击按钮 清掉已有样式 给所点击的项添加样式 
        var btn = document.querySelectorAll("#list li");
        var contain = document.querySelectorAll(".main div");
        for(var i=0;i<btn.length;i++){
            btn[i].index = i;
            btn[i].onclick = function() {
                for(var j=0;j<contain.length;j++) {
                    btn[j].className = '';
                    contain[j].className = 'active';
                }
                console.log(this)
                this.className = 'selected';
                contain[this.index].className = 'active choose';
            }
        }

    </script>
</body>
</html>