Can anyone help me with a javascript problem please?

I am running windows xp home, I have the latest version of norton anti virus.
The problem I am having is that Javascript cannot be displayed. The settings are okay on Norton as Javascript is enabled as it is in my internet options.
An example is that, on Caithness.org front page the title bar with the drop down list is not showing. I have had my pc into local retailers and they checked everything and it was fine. The software is okay as it has been checked.
Does anyone one have any suggestions as to what the problem could be?

I would be grateful for any advice.
Thanks.