I'm not an expert on Javascript in fact I was just reciently trying to learn it until I started reading about people that dont even have javascript turned on on their computers because they say that javascript can be a big security problem and I started wondering about these security issues.

Is really javascript a security problem? If yes, can someone mention some of those possible problems? I simply would like to reconsidere my desition of not using Javascript in my sites and start using it since I really like the language and the cool effects you can achieve with it.

As always thanks a lot for your help!