The Mozilla browsers and Internet Explorer, provide a settings window where you can list such websites, that will permit Pop-up windows.
In other words, you fly an Internet browser, adjusting the trim and fuel settings as you go, if you mean to get there and back.
It's a bit more fine grained in Firefox. If you go to Tools, Options, Web Features, Advanced (for JavaScript), uncheck that it allows scripting to raise new windows. This is separate from the popup blocker, in that unchecking this will stop things you purposely clicked on from doing popups.