the page located at the URL that you specified as the "banner" will be opened in a frame occupying the top 150 pixels of the page, while the page located at the URL that you specified as your main link will be opened in a frame occupying the rest of the space under.

there is a script that will pop-out the your banner in the case where one of the framed window would break out of frame before x seconds.

if you specify no banner or set the banner to "none", there will be no banner and no frames.