Need Help Debugging Script/Error in Script - Combining scripts on a page

Hi all,
I was wondering if anyone could help me with an issue I'm having when I use 2 scripts on 1 page.

On the page 82.110.105.93/centuriondiyconservatories.com/centurion/design_your_own.html I'm using a script on the 'Tell me more' links to bring up a javascript window.

On the page 82.110.105.93/centuriondiyconservatories.com/centurion/more_design.html I'm using a script on the drop-down options to call in a different image in the lower left(only the edwardian options have images at the moment)

However, when I try to use both scripts on 1 page, like 82.110.105.93/centuriondiyconservatories.com/centurion/more_design%20copy.html I am shown all of the drop down options at once.

Basically what I'm asking is if anyone is able to help me to correct this problem with the drop-down menu's showing.

Thanks.
(ps. sorry about the links, it's my first post so I can't put in the http)

Hi Hrimthurs, welcome to the forums,
I'm getting "forbidden"s for those pages, so I can only guess.
Do any variables / functions in the scripts have the same names thus causing a naming conflict?
If a script is modifying the DOM, does it run exclusively from the other script (ie. "thread safe")?