来 55 个 jQuery 表单相关的差距，慢慢消受吧。
Form Validator with several features such as grouping required fields or conditional checking if it is valid or not. Also you can validate string, numeric, date or e-mail. And you can combine several validations. For example: required numeric input and minimum 5 chars long.
ToggleVal gives you the option to populate the default text of form fields (in a few different ways), and will then toggle the default value when the field receives and loses keyboard focus.