Form Validation + Ajax Submit With ProtoForm

ProtoForm is a "very easy to implement’, lightweight (4kb) & unobtrusive form validation & Ajaxed submit solution that depends on Prototype.

It can validate:

• e-mail
• date
• telephone number
• URL

Parameters are mentioned within the attributes like:

This makes it very easy to implement (a negative point can be requirement to define the ids in a specific way).
ProtoForm also sends data and shows response with Ajax, highlights the form field on focus and on error.

 Requirements: Prototype
Compatibility: All Major Browsers
Website: http://www.cssrevolt.com/upload/files/protoform/