Vertical Slide-In Ads:
Size is 125 x 300 pixels, including any borders.
Type is animated .GIF.
Maximum file size for a frame is 50 kilobytes. Number of .gif colors should be
16 to keep frame file size within limits No transparency. Ideally, frames with
contrasting colors, each frame is to have at least a 1 pixel border.
Ad timing and sequencing will be similar to example.
Three frames is normal.
Maximum number of frames is four.
Maximum duration of ad is fifteen seconds.
Execution is two times per page load.
Here to see example.