In IE4 and later, this script launches a type of window ad servers call a 'peeker' popup -- which slowly glides into view from the bottom of the screen. This is a 'frameless' popup window without the Windows frame or titlebar (that is, a "containerless" window) for a clean, non-Windows look. Degrades functionally in other 4.x+ browsers; includes flexible, settable parameters for positioning and control.