I can see that both onchange and onclick work with the select element in IE 6. Is there one that would be better to use? From what I read here, it seems like onchange works with select, but it also says that onclick works with most things (so I'm guessing it's safe to use both of them?):
you can use onclick when you are using mouse event and onchange you can use for forms, textboxes for anything which changes with or without user interactions.