You think deleting / adding files is not dangerous? Remember that there are a lot of files on your pc which are vitaly needed to keep your computer running well, if you can delete these files a reinstall is probably the only way to go... adding files can be very dangerous too...

Anyway the best thing to do is just not visit these websites which you don't trust, dont click links on MSN which people send to you without asking them what it is (and if you dont trust the guy who send you the link you shouldnt even think about clicking it)

javascript is not really dangerous. I think it depends on the browser that you use.
IE supports many javascript functions. While it is good to have additional function in javascript, it can be dangerous for the user when hacker finds a way to do malicious thing.

Just choose your browser wisely.

A firefox addon called "NoScript" can let you choose what sites to block by default, and what sites to allow. I use that and I find that it's really useful, especially when I'm paranoid on a site. Although javascript doesn't do much harm to browsers or computers...

But it can hurt you emotionally until throwing up...

Have you ever found about the GNAA last measure unified X code? Hope not... So freaking sick...

Let's say it's a compilation of all the sick stuff you find on internet (goat**, tub****, tub***) and more sick evil eew stuff...

When you watch it you get "eyeraped" (my friend said so), also, the little bonus factor is that when you watch it there is a embedded soundclip that loops really loud of a man screaming "HEY EVERYBODY, I AM WATCHING GAY PORNO" so everyone around you notices this and goes watch what the hell you are doing and they find you ahead that ton of images.

SICK images. All popping up on your web browser and lots of tabs and more stuff and the windows move around, making it difficult. All that stuff increases highty your adrenaline. BTW, see how javascript can do magic?

I forgot to mention that it opens your e-mail client a lot of times like your web browser windows and it induces you to send an e-mail to the GNAA so you join them...

Perfect prank, JS seems to do a lot of stuff. :S

Another fact is that GNAA is: Gay *BLEEP* American Association.

This is enough to say that the website is totally unsafe... Watch out for those stupid guys. Please!

xD

A pure javascript hack can't add or delete files (except for that sites cookie). On the other hand, javascript can be used to steal your username and password. If a cite allows users to post links, and doesn't properly sanitize user input, a hacker (or script kiddie) could insert a "cookie stealer" by using javascript entities.

Also, IE supports VBscript, which is like javascript in the fact it's run client side, yet is more like visual basic in form and function, and thereby more powerfull.