Have you tried in the enlargeit.
js file making that path to the images a full url like so
var enl_gifpath='http://www.ihmsa.net/ppc/
js/'; // path to graphics
what kills me is no one has ever reported this ever. worked for me provided I have /
js/ as the path to the images
If that does not work maybe I can find time to find some kind of retrograde back to before this but have to dig up older files for that