jQuery :checkbox replacement

I had to set up a checkbox replacement for the site http://www.reallysimplesurvey.com/sign-up, so I first went looking for a good replacement. I found one that I'd used before, but it required jQuery UI. Since I hate adding jQuery UI for "simple" tasks, and since trying to get jQuery UI working sanely in Concrete5 can be a bit of a trick, I decided to write my own (people who know me know it doesn't take much to convince me to rewrite Javascript just for kicks and giggles…).

I had some trouble with race conditions in IE, and I didn't spend too much time troubleshooting why, so the code might be sloppier than usual. Also, the only comments in the code at the moment are IE gripes, so my apologies :-p The use of double-class selectors means IE6 won't show when the checkboxes have keyboard focus, but all else should work without problem.

Please take it for a test spin and let me know how it works. This is the first release, so YMMV and feedback is welcome.