网页中tab标签切换分别用jquery和javascript源码实现

//HTML布局
<ul id="tabTitle">
    <li class="active">HTML5</li>
    <li>PHP</li>
    <li>Java</li>
</ul>
<div id="div1" style="display: block">
    HTML5
</div>
<div id="div2">
    PHP
</div>
<div id="div3">
    Java
</div>

//css样式
<style type="text/css">
    * {
        margin: 0;
        padding: 0;
    }
    
    li {
        list-style: none;
        float: left;
        padding: 5px 10px;
        border: 1px solid #008000;
        margin: 10px;
    }
    
    div {
        width: 150px;
        height: 140px;
        border: 1px solid black;
        clear: both;
        margin-left: 10px;
        display: none;
    }
    
    .active {
        background: palegreen;
    }
</style>

//javascript源码
<script type="text/javascript">
    window.onload = function() {
        var oUl = document.getElementById("tabTitle");
        var aLi = oUl.getElementsByTagName('li');
        var aDiv = document.getElementsByTagName('div');

        for(var i = 0; i < aLi.length; i++) {
            aLi[i].index = i;
            aLi[i].onclick = function() {
                for(var i = 0; i < aLi.length; i++) {
                    aLi[i].className = '';
                    aDiv[i].style.display = 'none';
                }
                this.className = 'active';
                aDiv[this.index].style.display = 'block';
            };
        };
    };
</script>

<ul id="tabTitle">
    <li class="active">HTML5</li>
    <li>PHP</li>
    <li>Java</li>
</ul>
<div id="wrap">
    <div id="div1" style="display: block">
        HTML5
    </div>
    <div id="div2">
        PHP
    </div>
    <div id="div3">
        Java
    </div>
</div>

<style type="text/css">
    * {
        margin: 0;
        padding: 0;
    }
    
    li {
        list-style: none;
        float: left;
        padding: 5px 10px;
        border: 1px solid #008000;
        margin: 10px;
    }
    
    #wrap div {
        width: 150px;
        height: 140px;
        border: 1px solid black;
        clear: both;
        margin-left: 10px;
        display: none;
    }
    
    .active {
        background: palegreen;
    }
</style>

<script src="js/jquery-3.1.0.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
$(function () {
    $('ul li').click(function () {
        //切换标签样式
        $(this).addClass('active').siblings().removeClass('active');
        //切换div显示隐藏
        $('#wrap>div').eq($(this).index()).show().siblings().hide();

        //也可以直接写成一句话，和上面两句分着写效果是一样的
        $(this).addClass('active').siblings().removeClass('active').parent().next().children().eq($(this).index()).show().siblings().hide();
    });
});
</script>