Could you please rephrase your request? Are you looking for online advertising provider services? Hi Ed05,
From what I can determine there aren't any immediately identifiable scripts which could generate popups on your website. There are no uCoz scripts which can result in this functionality either. From what I can see it's possible that a FB script could generate this, however, it would be a rare occurrence. You have no embedded elements using iFrame scripting?
Otherwise have you checked your computer for adware? I know there's been times when even I find adware has conveniently hooked onto the end of a file without me or my virus software realising, until after it's happened - granted this was a good few years ago now, although you never know the likelihood.
Web Applications Developer Been here for 7 years and counting. Visit me at alexmoloney.me.