Async postback

Async postback


im using ASP.NET MVC here and want to do async postback after a form submit/button click.
I actually have a custom object I want to postback. This works just fine using the standard form action etc.... but now I want to do it using async/jquery.
 
so, how can I actually perform an async postback in jquery? I have a url, I have the values I want to postback but how can I async postback as well as passing this custom object to the serverside for processing? (to the controller action)
 
thanks