Javascript rotator images showing only half (IE 7 issue?)

I just worked on my first site, bear with me. Here is the url and the site shows up fine on:
IE 8
But when my coworker pulls it up it looks like this:

webimg1 by [url=]Unleashed Image, on Flickr

The only thing we can believe might be causing this is that he is on IE7. Is there a way to add code to allow other people who come to the site to view it properly in IE7, IE6, etc?

Also, and again, sorry for silly questions, but i’ve done the site with separate pages in Dreamweaver CS5 and would like to make it a complete site so we can upload from the root and update pages. Is there an “easy” way to integrate the pages/code or do I have to rebuild?

Thanks in advance!!!