viewer.cgi  A general-purpose html viewer for all images in
   a given directory.  The order is numeric.
Usage: viewer.cgi web-accessible_directory [number_to_display]
Examples:
http://www.atmos.washington.edu/~ovens/loops/viewer.cgi?/home/disk/atmos/101ta/public_html/slideshow
Author:  David Ovens, Univ. of Washington, Jan 11, 2001, 
                ovens@atmos.washington.edu