Looking for a script to stop guestbook spamming
I installed cPanels advanced guestbook on 2 client sites. The problem is they are being bombarded by spammers. It's obviously an automatic script making all these damn annoying entries so I'm thinking I should put up a verification script before people can make an entry. I'm thinking the kind of script that automatically generates a .gif or .jpg with a code on it and must be entered manually before being allowed to make an entry into the book should relieve my problem a great deal.Anybody know where I can find these scripts? I'm not even sure what they are called so I dont know what to enter into google.
TIA.