jquery控制页面的展开和隐藏实现方法(推荐)

<script>       require(["jquery","validate","bootstrap","lhgcalendar"],function($) {         $(function(){             $("form").validate();         });             $(".up").click(function(){           $(this).parent().parent().parent().parent().next().slideToggle("slow");         });        });  </script> 

<div class="panel panel-default"> <table class="table table-bordered">   <thead> <tr class=" active" id="a3">   <th width="15%" style="text-align:center;">加盟状态</th>   <th width="25%" style="text-align:center;">申请表名称</th>   <th width="25%" style="text-align:center;">审核情况</th>   <th width="25%" style="text-align:center;">操作</th>   <th width="10%" style="text-align:center;">隐藏/展开切换</th> </tr>   </thead>   <tbod> <tr style="text-align:center;" class=" active">   <td><strong class="text-warning">第1步：<? echo $stage->name;?></strong></td>   <td><a href="#">《信息表》</a></td>   <td>-</td>   <td>-</td>   <td> <span class="up text-info" ><i class="glyphicon glyphicon-chevron-down"style="padding:0px 5px 0 5px;"></i></span>   </td> </tr>   </tbody> </table> <div class="panel-body" style="display:none;">   <table class="table"> <tbody>   <tr>     <td>-</td>      <td>-</td><pre name="code" class="html">    <td>-</td>    </tr>  </tbody>    </table> </div>  </div>