Random Image Rotation
http://www.alistapart.com/articles/randomizer/

Benjamin, Dan
List Apart, A
2003

Abstract:

Readers return to sites that appear fresh and new on each visit. On a news site, magazine, or blog, stories or headlines will be updated frequently. But how can static sites keep that fresh feeling? Dan Benjamin’s free image randomizer may do the trick, and you needn’t be a programmer to install it.