A system to place online advertisements on a first page includes a display output to render a primary advertisement on at least a portion of a first web page and a timer to measure a first predetermined period of time that the first web page is displayed. The system includes an advertisement controller, coupled to the display output and the timer, to switch the primary advertisement to display a secondary advertisement on the portion of the first web page. The advertisement controller is further responsive to a request to recall the primary advertisement after the switching has occurred and to switch the secondary advertisement with the primary advertisement.