<link rel="stylesheet" href="/static/index/layui/css/layui.css" rel="external nofollow" ><script type="text/javascript" src="/static/index/layui/layui.js" charset="utf-8"></script><script type="text/javascript" src="/static/index/js/jquery-3.3.1.min.js" charset="utf-8"></script><form class="layui-form" action=""> <div class="layui-form-item">  <label class="layui-form-label" style="width:100px">是否已購買：</label>  <div class="layui-input-block" id="IsPurchased" >   <input type="radio" name="t" value="購買" title="購買" lay-filter="aaa"/>   <input type="radio" name="t" value="試用" title="試用" lay-filter="aaa"/>  </div> </div> <div class="layui-form-item count">  <label class="layui-form-label">試用次數(shù)：</label>  <div class="layui-input-inline">   <input type="text" id="ProbationAccount" required="required" placeholder="請輸入試用次數(shù)" autocomplete="off" class="layui-input" />  </div>  <div class="layui-form-mid layui-word-aux"></div> </div> </form> <script>   layui.use('form', function () {   var form = layui.form;    form.on('radio(aaa)', function (data) {     if ($('#IsPurchased input[name="t"]:checked ').val() == "購買") {     $(".count").hide();    }    else {     $(".count").show();    }    form.render();   });  });   </script>