jquery.validation usage

jquery.validation.example.js

$(document).ready(function(){
    $('#change_email_form').validate({
        rules: {
            email1: {required:true, email:true},
            email2: {required:true, email:true, equalto:"#id_email1"},
        },
        messages: {
            email2: {
                equalto: '两次输入邮箱地址不一致'
            }
        }
    });
});