Here's the code I'm using:
And the page I'm trying to get the multiple divs with their own set of fading images working is the homepage, aka http://www.enlinegraphics.com
EDIT: I'm going to try my hand at JQuery per an answer's suggestion – if you have any help that will help me with that, that would be the focus now, not trying to get xfade working. Thanks.
You could consider implementing and learning jQuery, which has a few plugins to fade things as well as built in functions such as fadeIn(), fadeOut(), etc.
You could use multiple divs fade using a selector like this
More specifically if at this stage you'd like to get started on fading Div's, check out the jQuery docs at http://docs.jquery.com, more specifically the selectors (for selecting the div) and the effects (for learning how and which functions to use).