Context:
Popup and pop-back ads annoy many web surfers. So do web sites that open a seemingly endless number of windows when the surfer enters a home page. The secret to this madness is using JavaScript to control the browser window. You’ll see how this is done in Chapter 9.
I know what a pop-up ad is. It's a type of browser window which all of a sudden pops up on screen with those annoying advertisements when you're surfing the net. But what is a pop-back ad?