It's been a couple years since I've implemented one of these, but I've used this method in various forms on projects for at least a decade. Sometimes I use a h

It's been a couple years since I've implemented one of these, but I've used this method in various forms on projects for at least a decade. Sometimes I use a hidden "email" field. Sometimes a hidden "subject" field. Hadn't thought of a "url" field, which is a great idea. It works surprisingly well.