JQuery is a very flexible tool for managing form data. There is a plugin that allows JQuery to manage form data passing this data using AJAX.
I highly recommend reading the great posts over at http://api.jquery.com/jQuery.post/
Telling JQuery about your Form
In order for JQuery to process your form you need to tell it a few things first.
• What Form to work on
• How to validate the form
• Where to post the form data to
• What to do next (On success)