jquery插件jquery.validate.js的使用问题

Question

页面如下：<div class="pr">
     <input type="text" class="text w186" name="freeemail" value="<!--{$fmail}-->" id="freeemail" /> <span class="red">@163.com</span>
                 <label id="checking_user" class="checking">检查中...</label>
                </div>JS如下：$(function(){ 
     var i = 0;
     $('#freeemail_form').validate({
        submitHandler: function(form) {
            set_nickname();
            
            var options = {  
                type:     'post',       // 'get' or 'post', override for form's 'method' attribute 
                dataType: 'json',
                beforeSend: showStart,
                success:   showResponse
            };
            $(form).ajaxSubmit(options);
        },
        errorPlacement: function(error, element){
            error.appendTo(element.parent("div"));
        },
        onkeyup: false,
        focusCleanup: true,
        errorElement : "div",
        focusOnFunc:function(element, error) {
            //$(error).hide();
            $(element).siblings('.error').hide();
            $(element).siblings('.validate_right').hide();
            $(element).siblings('.note_pop').show();
        },
        focusOutFunc:function(element, error) {
            $(element).siblings('.note_pop').hide();
        },
        success : function(label){
            label.siblings('.note_pop').hide();
            label.addClass('validate_right');
        },
        rules : {
            freeemail : {
                freemail: true,
                remote : {
                    url :'index.php?ctrl=register&act=is_exist&type=freeemail',
                    type:'get',
                    data:{
                        name : function() {
                            return $('#freeemail').val()+"@sina.cn";
                        }
                    },
                    beforeSend : function(){
                        var _checking = $('#checking_user');
                        _checking.next('label').hide();
                        _checking.next('div').hide();
                        $(_checking).show();
                    },
                    complete :function(){
                        $('#checking_user').hide();
                        i += 1;
                    }
                }
            },
        },
        messages : {
            freeemail : {
                freemail :  "邮箱名只能是字母,数字和下划线构成<span></span>",
                remote : "该邮箱地址已被注册，是否立即<a href='#' onclick='popup();'>登录</a>？<span></span>",
                often : "您的注册过于频繁，请1小时后重试。"
            }
        }
    });
    
});当用户注册的次数超过10次时，显示often的提示信息。哪位大侠用过该插件请指教！！！