iDialog 点击第二次不显示，这问题怎么解决，是框架Bug吗？

<div id="appendMenu" data-toggle="topjui-dialog" title="新增菜单" data-options="modal:true,iconCls:'fa fa-plus',buttons:'#btnMenu'" style="width: 450px; height: 333px; padding: 20px;">

        <form id="fMenu" method="post">

            <input type="hidden" name="uGuid" value="00000000-0000-0000-0000-000000000000" id="hdfuGuid" />

            <div class="topjui-row">

                <div class="topjui-col-sm11">

                    <label class="topjui-form-label">菜单名称</label>

                    <div class="topjui-input-block">

                        <input type="text" name="cMenuName" data-toggle="topjui-textbox"

                               data-options="required:true">

                    </div>

                </div>

            </div>

            <div class="topjui-row">

                <div class="topjui-col-sm11">

                    <label class="topjui-form-label">菜单路径</label>

                    <div class="topjui-input-block" style="padding-top: 4px;">

                        <input type="text" name="cMenuUrl" data-toggle="topjui-textbox">

                    </div>

                </div>

            </div>

            <div class="topjui-row">

                <div class="topjui-col-sm11">

                    <label class="topjui-form-label">所属系统</label>

                    <div class="topjui-input-block" style="padding-top: 4px;">

                        <input type="text" name="cSystem" id="cbSystem" data-toggle="topjui-combobox" data-options="required:true, prompt:'必选'">

                    </div>

                </div>

            </div>

        </form>

    </div>