JavaScript实现多栏目切换效果

效果：

代码：

<!doctype html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>JavaScript实现多栏目切换效果</title>
    <style>
        .news_wrap
        {
            width: 380px;
            height: 266px;
            float: left;
            margin-left: 15px;
        }
        .news_head
        {
            width: 380px;
            border-bottom: 2px solid #dedede;
            height: 51px;
            line-height: 51px;
        }
        .tabList ul li
        {
            float: left;
            cursor: pointer;
            font-weight: bold;
            text-align: center;
            font-size: 16px;
            width: 72px;
        }
        .cli1
        {
            color: #3a7aaf;
            border-bottom: 2px solid #3a7aaf;
        }
        .more
        {
            font-size: 14px;
            color: #9a9a9a;
            float: right;
            font-weight: normal;
            padding-right: 0;
        }
        .tabCon
        {
            width: 376px;
            padding-top: 13px;
            overflow: hidden;
        }
    </style>
</head>
<body>
    <div class="news_wrap">
        <div class="news_head">
            <div class="tabList">
                <ul>
                    <li class="cli1" id="p1" onmouseover="return swap_tab(1)">工作动态</li>
                    <li class="cli2" id="p2" onmouseover="return swap_tab(2)">媒体链接</li>
                    <li class="cli2" id="p3" onmouseover="return swap_tab(3)">领导活动</li>
                </ul>
            </div>
            <div class="more">
                <div id="j1">
                    工作动态_more</div>
                <div id="j2" style="display: none;">
                    媒体链接_more</div>
                <div id="j3" style="display: none;">
                    领导活动_more
                </div>
            </div>
        </div>
        <div class="tabCon">
            <div id="n1">
                <li>工作动态_list</li>
                <li>工作动态_list</li>
                <li>工作动态_list</li>
            </div>
            <div id="n2" style="display: none;">
                <li>媒体链接_list </li>
                <li>媒体链接_list </li>
                <li>媒体链接_list </li>
            </div>
            <div id="n3" style="display: none;">
                <li>领导活动_list </li>
                <li>领导活动_list </li>
                <li>领导活动_list </li>
            </div>
        </div>
    </div>
</body>

<script>
    function swap_tab(n) { //鼠标触发事件
        for (var i = 1; i < 4; i++) {
            var curC = document.getElementById("n" + i);
            var curB = document.getElementById("p" + i);
            var mores = document.getElementById("j" + i);
            if (n == i) {
                curC.style.display = "block";
                curB.className = "cli1";
                mores.style.display = "block";
            }
            else {
                curC.style.display = "none";
                curB.className = "cli2";
                mores.style.display = "none";
            }
        }
    }
</script>

</html>