Fastclick today announced the new "on-focus" technology they hope will change large-format online advertising. Fastclick's large ad format pop-unders appear when a
user closes their browser, displaying a fully loaded creative without interrupting the user's Internet experience. The new "on-focus" technology launches a rich media advertisement, full of sound,
video, and interactivity, which only begins to play when the user closes their Internet browser and sees the ad for the first time.
