jquery.validate结合ajax验证邮箱是否已在数据库中存在的时候出错
jquery.validate验证登录 其他都挺好
就是在结合ajax验证邮箱是否已存在的时候出错

txtUserEmail: {

                        required: true,

                        remote: {

                            type: "post",

                            url: "/AJAX/CheckUserEmail.ashx?fresh=" + Math.random(),

                            data: {

                                UserEmail: function () {

                                    return $("#txtUserEmail").val();

                                }

                            },

                            dataType: "html",

                            dataFilter: function (data, type) {

                                $("#divhahaha").html(data);

                                if (data == "true") { return false; }

                                else { return true; }

                            }

                        }

                    }

ajax返回数据 如果 默认return false  那不论数据库有没有 都是通过 
默认是return true  那都不通过 
不晓得什么原因
我搞了个div 接收ajax返回的值 都挺正常的