<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>选项卡1</title>

    <style>

        #div1 div {

            width: 200px;

            height: 200px;

            background-color: #ccc;

            border: 1px solid pink;

            display: none;  //默认不显示DIV

        }

        #div1 .active {

            background-color: greenyellow;

        }

    </style>

    <script>

        window.onload = function () {

            var oDiv = document.getElementById('div1');

            var aBtn = oDiv.getElementsByTagName('input');

            var aDiv = oDiv.getElementsByTagName('div');

           for(i=0;i<aBtn.length;i++){

               aBtn[i].index = i;                   //给按钮自定义一个index属性,用于改变DIV

               aBtn[i].onclick = function () {

                   for(i=0;i<aBtn.length;i++){

                       aBtn[i].className = '';      //点击当前按钮时,取消对上一个按钮的设置

                       aDiv[i].style.display = 'none';  //点击当前按钮时,取消对上一个按钮对应的DIV的设置

                   }

                   this.className = 'active';       //点击按钮时,背景颜色改变

                   aDiv[this.index].style.display = 'block';

               }

           }

        }

    </script>

</head>

<body>

    <div id="div1">

        <input class="active" type="button" value="教育"/>

        <input type="button" value="培训"/>

        <input type="button" value="招生"/>

        <input type="button" value="出国"/>

        <div style="display: block;">1234</div>

        <div>2345</div>

        <div>3456</div>

        <div>4567</div>

    </div>

</body>

</html>

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>选项卡2</title>

<style>

    #div1 div{height:200px; width:200px; border:1px solid purple}

    #div1 .active{background-color: olivedrab;}

</style>

<script>

    window.onload = function () {

        var arr = [1234,"abcd","fsafa","fabf"];     //以数组的方式列出Div里面的内容

        var aDiv = document.getElementById('div1');

        var aBtn = aDiv.getElementsByTagName('input');

        var oDiv = aDiv.getElementsByTagName('div')[0];     //获取选项卡内容区域第一个Div

        for (var i = 0; i < aBtn.length; i++) {

            aBtn[i].index = i;      //给Div自定义的一个索引属性

            aBtn[i].onclick = function () {

                for (var i = 0; i < aBtn.length; i++) {

                    aBtn[i].className = '';     //清空上一步选项卡标签项的设置

                }

                    this.className = 'active';      //点击时启用active类属性设置

                    oDiv.innerHTML = arr[this.index];   //将数组元素赋给Div

                    oDiv.style.display = 'block';       //显示Div内容

            }

        }

    }

</script>

</head>

<body>

<div id="div1">

    <input class="active" type="button" value="教育"/>

    <input type="button" value="培训"/>

    <input type="button" value="招生"/>

    <input type="button" value="出国"/>

    <br/><br/>

    <div style="display: block;">1234</div>

</div>

</body>

</html>