URL linking

[priapus]

I've posted on this before but am still having some problems. I have this form where a user enters a company name into a certain text box, resulting in data on that company to appear in certain other text boxes (e.g. creditcardnumber, creditcardexpmonth, creditcardexpyear, et.). the user then clicks on a button, which links to a url. this site contains some empty fields where credit card information is entered. At present the user has to manually read the data from the form and reenter it to the fields on the website before hitting hit the site's submit button to bill the company. is there a way to have the data from the text boxes in the form to be automatically copied/exported to the corresponding fields on the site when the hyperlink button is clicked? thanks much in advance.