ahh okay cool. it was also because i saw 'ad.doubleclick.net' which i always assume is a tracking cookie or something... that wouldn't have downloaded anything to my ipad, right? i cleared my cookies on safari anyway.
i haven't jailbroken my ipad and don't intend to. usually am careful what i go on, but am so used to adblock on my computer i forget about ads, and then accidentally clicked one, which took me through ad.doubleclick.net, and then finally to the link i posted above, and i got a bit concerned, so i was/am prepeared to do a system restore if needed to keep my ipad clean, though i don't particularly want to have to do that.