Multiple forms, multiple buttons, partial validation, post back all form0 and form1 data?

Multiple forms, multiple buttons, partial validation, post back all form0 and form1 data?

I've a page which has 2 buttons, the first button should validate only 1 field and show errors if validation incorrect.  The second button should validate everything but how do I make JQuery Plugin, invoke an event to validate the top form form0. 
 
Also when I submit, it should post back all the data across the 2 forms?
 
Help!