create php / ajax submit forms on ebay listing

I need a php/ajax solution to have a form that users can submit from a ebay listing. Ebay only allow certain types of script etc. so you will need to know ebay listing ethics. We need the user to be able to submit their username and some colour variations from inside the listing, without leaving the page when they submit. Here is an example thats using flash, but we need a similar soloution. [login to view URL] I will need to be able to setup different forms that will be included in different auctions. Forms will include dropdown box for colour selection etc. You will need to have a ebay account to test everything out and that it works on [login to view URL], then deliver a working soloution to us. This is needed ASAP within 24hrs, but should be straight forward for a decent programmer. $40 available for this project. Please do not bid if you cant do it in the price range, your bid will only be removed.