Inspired by some Javascript questions I was asked recently by a few co-workers, I decided to put together what started out a little reference/cheat-sheet, but which ultimately took the form of a Javascript Quiz.
It's meant to be fun and informative. You keep track of your own answers (if you want to); no one ever has to know what you got right or wrong.
I should mentioned that I did NOT test this in all browsers. I'm a Firefox guy, so that's where I do most of my testing and development for little one-off personal projects like this. I did take a quick pass with IE8 and Chrome, but I did NOT test with IE6 or IE7 or Safari. If something doesn't work in one of those browsers, feel free to let me know, but bear in mind that there is a strong possibility that I will not care in the least 
And of course, there's always multiple ways to solve a problem. I do not claim any sort of authority with any of the answers I've provided. If you dislike an answer of feel you have a better one, good for you 
Anyway, here it is: http://blog.stchur.com/blogcode/jsquiz
Enjoy!