We are creating a e-commerce site and enlisting many affiliates, however the affiliates do not have their own website, we create a redirect page for each affiliate to send their web traffic too that links to our index.htm page, therefore we can track which affiliate sent us the traffic in oreder to reward the proper affiliate, however, we also reward the affiliates when their traffic clicks on a banner or product link that we are hosting from another site. The question is, How can we track a transaction at another site to reward the affiliate that sent us that customer originally. if anyone has the answer it is appreciated. Thank you