白茶清风无别事  
<!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>
        .btn{
            margin: 20px 120px;
            width: 80px;        
        }
        .content{
            margin: 10px auto;
            display: none;
        }
        .btn.active{
            background-color: pink;
        }
        .content.show{
            display:block;
            
        }
    </style>
</head>
<body>
    <p class="btn1">
        <button class="btn active">页面一</button>

        <button class="btn">页面二</button>
    
        <button class="btn">页面三</button>
    </p>

    <div class="content show">
         <p>页面一要显示的内容</p>
         <input type="text" placeholder="页面一内容"/>
    </div>
<div class="content"> <p>页面二要显示的内容</p> <input type="text" placeholder="页面二内容" /> </div> <div class="content" > <p>页面三要显示的内容</p> <input type="text" placeholder="页面三内容"/> </div> <script>
     //获取页面的每个按钮 var btns = document.getElementsByClassName("btn")
     //获取内容盒子
var contents = document.getElementsByClassName("content")      //遍历每个按钮为其添加点击事件 for(var i=0;i<btns.length;i++){ btns[i].index = i; btns[i].onclick = function(){
          //对当前点击的按钮赋予active类名及显示当前按钮对应的内容
for(var j=0;j<btns.length;j++){ btns[j].className = btns[j].className.replace(' active', '').trim(); contents[j].className = contents[j].className.replace(' show', '').trim(); } this.className = this.className + ' active'; contents[this.index].className = contents[this.index].className + ' show'; }; } </script> </body> </html>

 

posted on 2019-05-17 16:00  _Pluto  阅读(17566)  评论(0编辑  收藏  举报