[jQuery] Issue with FF back button

Hi, We have a form at www.floresdodia.com/checkout.php which uses very simple ajax validation with jquery. We only validate if the field is empty or not. Problem is when someone fills all fields and proceeds to the next page and want to edit something by pressing the back button, Firefox does

[jQuery] Query string separator

setting in jQuery to parameterize the query separator. I only find two places in jQuery that hard code '': ajax() param() Of course if this were provided then all plugins that deal with forms could reference that value instead of hard coding '' as the query separator. Thanks, - Aparajita