I don't think it would be easier to write black text on a black background since that's what IE does anyway -- allowing the user to highlight the block to see the text. True, not as snazzy as in FF, but it gets the job done.
Nope, I didn't know that. But I do now...thank you. LOL
I have to disagree that it's "easier" for users to highlight text. Most would consider that "work" and get annoyed. But I agree it's kludgy. I'll work on a more elegant solution.
Your example spoiler code will not work in IE, you do know this.. right? It'd be easier to write black text on a black background and have visitors highlight it. Alternatively, a little JavaScript and you can hide/display content as much as you like.