So because of all the hoo-ha at the moment with IE,I downloaded firefox, which has been working fine all day. However, I can play tetris or watch videos on youtube while using firefox :( and this saddens me greatly.

When I try to watch youtube, a message come up saying that I either have my javascript turned off, or that I need to download the latest flash player; I've had this message crop up a few times today, and I have downloaded flash. So: how to turn on my javascript?

please?x