WordPress permalinks

Hi there,For the purpose of tracking visitors I need to add visitors email behind the affiliate link so that i created a simple form-something like this forrm< action=”http://affiliatelink.com”>Email:<input type=”text” name=”ID”> Submit.<input type=”submit”>it works fine but the result is something like this http://affiliatelink.com/?ID=email.I would like to rid off this ugly ?ID= part of the link.The permalinks are set up to “post name” in wordpress permalinks settings and all other links are fine.