jquery_validation_ex.js

$( "#form-memberRegister" ).validate( {
            errorClass: "error",
            rules: {
                "formatted-citizenID": {
                    required:true,
                    remote:{
                        url: "action/checkCitizenID",
                        type: "post",
                        dataType:'json',
                        data: {
                            citizenID: function() {
                                return $( "#citizenID" ).val();
                            }
                        },
                        dataFilter: function(data) {
                            var json = JSON.parse(data);
                            console.log("dataFilter",json);
                            if(json.status == true) {
                                return true;
                            }
                            return "\"" + json.message + "\"";
                        }
                    }
                },
                email:{
                    required:true,
                    email:true
                },
                emailConfirm:{
                    required:true,
                    equalTo:"#email"
                },
                password:{
                    required:true
                },
                passwordConfirm:{
                    required:true,
                    equalTo:"#password"
                }
            },
            messages: {
                "formatted-citizenID": "โปรดระบุเลขบัตรประจำตัวประชาชน",
                email:{
                    required:"โปรดกรอกข้อมูลให้ครบถ้วน",
                    email:"โปรดระบุรูปแบบอีเมลให้ถูกต้อง"
                }
            },
            errorPlacement:function(error,element){
                console.log(error,element);
                $( "<br>" ).appendTo( element.closest( ".form-group" ) );
				error.appendTo( element.closest( ".form-group" ) );
            },
            submitHandler: function (form) { // for demo
                console.log('valid form submitted'); // for demo
                return true; // for demo
            }
        });