jQuery Validation Engine 表单验证
中文:http://code.ciaoca.com/jquery/validation_engine/
https://github.com/posabsolute/jQuery-Validation-Engine
http://www.position-absolute.com/articles/jquery-form-validator-because-form-validation-is-a-mess/
学习这种通用的验证方式,不需要每个表单都那么麻烦地写一次验证