I have a Linux laptop, and my YouTube has just stopped working, whenever I go to play a video, a message comes up saying 'hello, you have either turned JavaScript off or need to download the flash player to this video' People have told me that I need to go on the 'Tools' tab at the top of my screen and press 'options', but there isn't an options button, the only buttons there are 'web-search, downloads, add-ons, error console, page info and delete recent history' I know I don't need to download the latest flash player because it had already come installed when I got my laptop last week. Can you please tell me how to turn JavaScript on please.

Thanks for your help.