Not a lot of magic is needed to create a proxy autoconfiguration file (PAC) for use in a Web browser, and there is plenty of reference material on the net. Since I didn't find a cheat-sheet at the time, I thought it would be good to have one, and set about writing one over a year ago.
I'd forgotten all about it but it surfaced the other evening. I've polished it up a bit and -- after asking Simon whether he thinks it is of use -- offer it for your enjoyment. Go ahead and get my Proxy autoconfiguration (PAC) reference card / cheat-sheet. If you have suggestion for improvement, I'm all ears.