表单的验证一直是Web开发头痛的问题，表单验证类 Validator就是为解决这个问题而写的，旨在使设计者从纷繁复杂的表单验证中解放出来，把精力集中于UI设计与业务逻辑上。-Verification form has been a headache for Web development, Forms Authentication is the type of Validator to solve this problem and wrote, designed to enable designers of complex form from the liberation of verification, to focus on the UI design and business logic.