I don't, vetto. I know that AJAX is being used here to instantly update the posts, but I am ANYTHING but a coding whiz....
I can tweak stuff, but not originate it. Big difference. I would bet there's some js out there that does what you want or something similar that would be tweakable, but I don't actually know what it is, so of course don't know where to find it. I'd suggest you start living on the free-script sites. And google IS your friend - or yahoo if that's your pref.
In fact, to point up my own "brainfade" in this direction, there's a post by Denis deBernardy re some updates to various of his plugins, one of which is a "simple" framebuster - and which I posted I was very glad to have.... because I can't write the "two simple" lines of js....
[[BTW, being a mod doesn't mean I KNOW anything, y'know? All it means is that I spend a lot of time here anyway, and I'm relatively trustworthy and somewhat knowledgeable! *laughing*]]