jQuery Tutorials: Safer Contact Forms Without CAPTCHAs
"...your visitor will have a limited amount of time (specified by you) to fill in the form and send it. And if a spammer tries to post information to your form processor remotely they’re going to hit a big fat roadblock."
"...you can create a honeypot form field that should be left blank and then use CSS to hide it from human users, but not bots." Pure CSS bot thwarting.
, 2011, 4:00 pm