$("#frmV").validate(
              {
                  /*自定义验证规则*/
                  rules: {
                      email:{
                        required:true,
                        email:true
                      }
                  },
                  /*错误提示位置*/
                  errorPlacement: function (error, element) {
                      error.appendTo(".tip");
                  }
              }
            );