A 'spoiler' text option?

[jilly]

There's a way I'm sure, but I can't figure it out, to add some sort of 'spoiler' css tag or something so that the text is white, like the message area background, but if you drag your mouse over it and higlight it, you can read it.

For a board discussing books or movies, where you want to put spoiler text in, so people don't accidentally give away secrets.

Like it would be :

OMG I saw this great movie this weekend, the ending was the best, so don't drag over the spoiler script unless you want to see it.

[.FONT=SPOILER] In the end of the movie the hero falls off a cliff and dies![./FONT]

and the spoiler font would make the text all white. This way if people can 'stop' themselves from dragging over it, they wont be spoiled..
A little less temptation than just plain trying not to look at the spoiler

has this been done yet?