Script by D. D. Mark Newman
Give this a whirl. It's really neat. You'll get an error because I haven't configured it to go anywhere. You'll need to do that for your own site.
Please note: This script is being offered in simple text format. When you click to Grab the Script, the text should display. Internet Explorer and AOL users may get a blank page or the script may run and produce the effect. If this happens, choose SAVE AS from the FILE menu and save the blank or compiled page.