I would also add to what I said above that after all your hard work of conceiving your web site, designing it or having it done, working for weeks, months or even years to finally see your site coming up on google search results, finally getting phone calls responding to your ads and web site visitors you do not want to instantly sabotage your efforts with an annoying pop up. Do prof. marketers not know how much the average surfer dislikes being popped at? Have they forgotten what it feels like to be the poppee?