Ok, I am working on a ad network and I want to allow members to be able to display popunder ads. Now I am currently with another ad network that does this and there popups/popunders do not get blocked by the browser. I am wondering how one goes about doing this? Also, My ads are currently being displayed using a iframe. Is it possible to create div overlays that will cover the parent frame? Because then I could create something similar to the fullpage ads on adbrite Thanks in advance.