On this page the rollover images do not preload and there is a slight delay when mousing over. I believe the "object required" and "object expected" errors are the culprit. These errors occur on the following pages, but none of the sub pages:

http://www.mwrgermany.com/index.htm
http://www.mwrgermany.com/hd/heidelberg.htm

In the code this appears to be an <![endif]--> statement. This is the only one without a browser displayed. The previous ones are all like this:

<![endif]-->
<!--[if gte IE 5]>

<![endif]-->
<!--[if lt IE 6]>

Suggestions?

You really don't need all that scripting for a simple rollover effect anyway, it's completely do-able with CSS.

You also need a proper DOCTYPE, you don't have one at all.

A method I'd suggest would be to use CSS sprites.
These combine the two image states (normal & rollover) into a single image of which only the relevant part is shown. The advantage is that you load both images at the same time and cut down on browser-server chitter chatter.
Hope this helps,
Tom

The two image states for rollover are ready ... do I have to manually code each button, or is there are simpler way?