Flash Navigation bar error in IE

I am a novice at Flash and I am working on updating my team's website [that 4 other designers created and worked on]. The flash navigation bar only works sometimes in Internet Explorer and comes up with an error. Also, it works on some pages, but not others even though it is the same code. It seems to work fine in other browsers.

The url is http://www.freshgames.com/

The error it spits is:

Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; InfoPath.1; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Timestamp: Wed, 22 Jul 2009 14:24:08 UTC


Message: 'MoveInit' is undefined
Line: 134
Char: 1
Code: 0
URI: http://freshgames.com/scripts/library.js

When I go to the library.js doc, this is how the code reads:

document.onmousedown=MoveInit;
document.onmouseup=Function("MoveEnabled=false");

Any help for fixing this error would be greatly appreciated.

This is a javascript error, and it has to do with the javascript not having the right method of accessing the Flash movie. It is different in FF and IE, so and I'm bad with JS, but that is some help, maybe a mod can move this to JS?

Thank you so much for the help!