Test Case Description for img-gif-87

Purpose:
To confirm that that GIF 87a images are properly displayed across different bit depths.

Initial Conditions:	None.

Steps/Description:	0. Launch the browser. 1. View the test page (linked below)

Expected Results:	a. A mozilla.org banner, displayed at a descending bit depth, starting at 8-bit, and ceasing at 3-bit, followed by a grayscale image. b. A Hubble space image, displayed at a descending bit depth, starting at 8-bit, and ceasing at 3-bit, followed by a grayscale image. c.5 rows of a single black pixel.

Link(s):	img-gif-87