Simplest slideshow loop bug

[gee202]

Okay, I've never tried to mess around with javascript on my own, but today I decided to look up a tutorial and modify the code.

I have come this far: http://psydelica.org/pro/lyhdyt/lyhd...yhtysarja.html

Yeah, not too complicated. There is something seriously wrong with the "Back" -button.. Once I click my way to the last image there's no way out from there anymore.
I can't figure out why, and I already thought I understood this simple piece of js..

[sunfighter]

Link not working.

Browser back button actions and js are not always compatible. For example the check mark on a checkbox will not reset. Browser at fault here. Maybe you need to code a reset button yourself to go back to the first image, or make the images cyclic.