Script for payment forms

I have a website up and running, but need help with a technical aspect of it. I need to be able to create forms on my site that are customizable to match forms on other website payment pages. For example, a user would want to sign up for another site that charges a fee, but would be doing it through us. Therefore, they would go to our site, enter their credit card information, name, etc - then press submit. Then we need an automatic script that would go to the site they want, enter their credit card information, name, etc into text boxes, and press submit. This would have to be customizable since there are numerous different websites they could be signing up for - but the general idea is the same - we present them with a form field that matches the form field on the site they are signing up for (we should be able to adjust it for each site as necessary) then, once they enter their info and press submit, the script takes them to the site, fills out the form, and presses submit. ? I also need to know if there's anything that would block this from happening on a secure payment page- do these pages block these scripts? I am very willing to pay for this service - please let me know the limitations, the timeframe, and suggest a price. ## Deliverables there is a referral link that we would need to take the user through when going from our site to the payment site - so we would need to preserve this link - in addition, there may be more than one page they need to go through when getting to the payment page on the destination site - the form information may also be located on two pages - so, for example a user would enter all the information in our form, press submit, and then the user will automatically be taken, using the referral link, to the first page on the website we're linking to, then go automatically through that page, to a form (or the first page of a form), have it automatically filled out using the information they entered, have the script automatically press submit, then take to the second form page, ? where the rest of the information is also filled out, and submit is pressed. Ideally, we should be able to customize this script, so we would show it exactly how to run through each linked website, what information to put where, how many pages to go through, etc - so the script is taught once and then runs through the same routine for that site every time. In addition, if something changes on the site so the script can no longer run through it exactly as we taught it, it should be able to notify us of a problem before a user tries it and it screws up with that user.