Capture User Information

We provide a leads service publication to architects and engineers across the county. This publication is delivered via PDF. The service is supported by advertisers. What we need to do is provide the advertisers a list of clients that have clicked on their ads. What we would like. The end user registers his Company Name, Contact Name and Email address. Then each time they click on an ad it would capture their information and store it into a database. We would then pass the info onto the advertiser so they would know who and how many visitors they had. Any comments are welcome. Thank you Winnie