简易tab标签切换JS代码

js部分：

 <script type="text/javascript">
                                    function notice_news_show(notice_news_i) {
                                        for (notice_news_ii = 1; notice_news_ii <= 3; notice_news_ii++) {
                                            if (notice_news_ii == notice_news_i) {
                                                document.getElementById("notice_news_t" + notice_news_ii).className = "n_t_hover"
                                                document.getElementById("notice_news_c" + notice_news_ii).style.display = "block"
                                            } else {
                                                document.getElementById("notice_news_t" + notice_news_ii).className = ""
                                                document.getElementById("notice_news_c" + notice_news_ii).style.display = "none"
                                            }
                                        }
                                    }
                                </script>

<ul class="n_main_title">
                                    <li id="notice_news_t1" class="n_t_hover"><a href="javascript:void(0);" onclick="notice_news_show(1)">
                                        公司公告</a></li>
                                    <li id="notice_news_t2"><a href="javascript:void(0);" onclick="notice_news_show(2)">
                                        公司新闻</a></li>
                                </ul>
 <div id="notice_news_c1">
                                    <div style="width: 400px; margin: 0 auto; padding: 6px 0 0;">
                                        <div class="news_list">
                                            <ul>
                                                    <li><em>2014-01-03</em><a href="/news/detail/56" title="2014年春节放假通知" target="_blank">2014年春节放假通知</a></li>
                                                    <li><em>2013-12-17</em><a href="/news/detail/54" title="华递2014精美台历" target="_blank">华递2014精美台历</a></li>
                                                    <li><em>2013-12-16</em><a href="/news/detail/53" title="举办2013年年会通知" target="_blank">举办2013年年会通知</a></li>
                                                    <li><em>2013-12-16</em><a href="/news/detail/52" title="元旦放假通知" target="_blank">元旦放假通知</a></li>
                                                    <li><em>2013-12-10</em><a href="/news/detail/51" title="关于与唐美平提前解除劳动合同的决定" target="_blank">关于与唐美平提前解除劳动合同的决定</a></li>
                                                    <li><em>2013-09-29</em><a href="/news/detail/36" title="致全体员工的一封感谢信" target="_blank">致全体员工的一封感谢信</a></li>
                                                    <li><em>2013-09-17</em><a href="/news/detail/33" title="中秋放假通知" target="_blank">中秋放假通知</a></li>
                                                    <li><em>2013-09-17</em><a href="/news/detail/32" title="国庆放假通知" target="_blank">国庆放假通知</a></li>
                                            </ul>
                                        </div>
                                    </div>
                                </div>
                                <div id="notice_news_c2" style="display: none;">
                                    <div style="width: 400px; margin: 0 auto; padding: 6px 0 0;">
                                        <div class="news_list">
                                            <ul>
                                                    <li><em>2013-11-02</em><a href="/news/detail/49" title="强势推出：瑞典小包以及新加坡小包服务" target="_blank">强势推出：瑞典小包以及新加坡小包服务</a></li>
                                                    <li><em>2013-07-29</em><a href="/news/detail/28" title="平安销售礼仪与服务培训" target="_blank">平安销售礼仪与服务培训</a></li>
                                                    <li><em>2013-03-14</em><a href="/news/detail/18" title="DHL需要正本商业发票的国家" target="_blank">DHL需要正本商业发票的国家</a></li>
                                                    <li><em>2012-11-20</em><a href="/news/detail/8" title="燃油附加费" target="_blank">燃油附加费</a></li>
                                            </ul>
                                        </div>
                                    </div>
                                </div>