Whenever I try and watch any videos on "youtube.com", I am greeted with the following message:

"Hello, you either have javascript turned off or an old version of macromedia's flash player."

I've got the current version of flash, so how can I see if I have javascript disabled, and fix it?

Cheers

 

Open your IE browser, assuming you are using IE,
Tools
Internet Options
Security tab
Make sure Internet is highlighted
Click on the Custom level button

Go through the option and you want active scripting enabled.