Form Problems

Hello,
On my site I have a shopping cart that is in an external js file. On my checkout page I have a form that passes some hidden fields to my credit card processor. Inside this form I have a call to the js file <script> checkout </script> which draws a table on the page with the order information in it. The table is displayed properly with no problems. However I am trying to save the information in the cart to a csv file. When the form is submitted no info is passed to the csv file. Is there a way to take the data out of the js file and make it part of the form and passed as hidden fields? If I could just get the info into the form everything else will work. I would greatly appreciate help from anyone on this. Thanks.