Quick HTML Help Needed

It's been a long time since I've done much HTML coding, and I was wondering if somebody could fix a couple things in a file that I have. I need the following things done:

I'd like a button that switches the feed of the widget from http://www.folklore.org/folklore.xml and feed://www.folklore.org/folklore_comments.xml and vice versa. If you would like to make just a basic placeholder image file as the button, that would be great.

I'd like the "Made By Ryan Sensenbrenner" text to be centered on the back.

Thanks!

P.S. The file that would most likely be changed is Main.html, except possibly the CSS for the placement of the text....

This is more of a Javascript thing, not HTML.

I would just change the reloadTopics Function to accept a parameter, that being the XML source file. Then make a link to change it like:
<a href="javascript:reloadTopics('www.folklore.org/folklore_comments.xml');">Change To Comments</a>.

I did it! Thanks mynameis! Will upload later...