jquery-validate 详解，解决class重复的方案

  <script type="text/javascript">
$.ajaxSetup({  
    async : false 
});
$(document).ready(function(){
 
 $("#accountFormId").validate({// #formId为需要进行验证的表单ID
   errorElement :"div",// 使用"div"标签标记错误， 默认:"label"
   errorClass :"validate-error",// 错误提示的css类名"error"
   onsubmit:true,// 是否在提交是验证,默认:true
   onfocusout:false,// 是否在获取焦点时验证,默认:true
   onkeyup :false,// 是否在敲击键盘时验证,默认:true
   onclick:false,// 是否在鼠标点击时验证（一般验证checkbox,radiobox）
   focusCleanup:false,// 当未通过验证的元素获得焦点时,并移除错误提示
       rules:{
                    accountName: {// 需要进行验证的输入框name
                        required: true,// 验证条件：必填
                        remote:{
        url:"account.do?met=check",     //后台处理程序
        type: "post",               //数据发送方式
        dataType: "html",           //接受数据格式  
        data:{                     //要传递的数据
         userName: function() {       
         return $("#accountName").val();
         }
          },
          dataFilter: function(data, type) {        
                         if (data == "1") 
                             return true; 
                         else 
                             return false; 
                     }                      
                     }
                    },
                    displayName: {// 需要进行验证的输入框name
                        required: true// 验证条件：必填
                    },
                    password: {// 需要进行验证的输入框name
                        required: true,// 验证条件：必填
                        minlength: 5,// 验证条件：最小长度为5
                        maxlength: 10
                    },
                    contactEmail: {// 需要进行验证的输入框name
                        required: true,// 验证条件：必填
                        email: true// 验证条件：格式为email
                    }
                },
                messages:{
                    accountName: {
                        required: "登录名不允许为空!",// 验证未通过的消息
                        remote:$.format("该登录名已存在！")
                    },
                    displayName: {
                        required: "昵称不允许为空!"// 验证未通过的消息
                    },
                    password: {
                        required: "密码不允许为空!",
                        minlength: jQuery.format("密码至少输入 {0} 字符!"),
                        maxlength: jQuery.format("密码至多输入 {0} 字符!")
                    },
                    contactEmail: {
                        required: "email不允许为空",
                        email: "邮件地址格式错误!"
                    }
                }
                })
 });
</script>