Sorry if this is posted on the wrong forum, but I have been wondering what did Megaupload used to do Popup-under that are virtually undetectable and unblockable, even with Chrome's AdBlocker and Firefox popup blocker. (I kept on getting those Poker and Games popup unders advertisements when MU was still alive!! Even though I have these Adblockers installed) I think this is very useful as when users visit my blogs and a window pops up that are hidden from the current screen, so the user won't directly aware that the popup came from my blog, or atleast as an non-intrusive way to show Popup unders. There will usually be an animation that a new window popups (usual windows 7 style), but it will then stay hidden away from the main window. Any ideas? Thanks!