Thanks Jeremy for having found the culprit ad with the evil javascript.
This event has made me now more worried about possible vulnerabilities with scripts execution
when surfing the web.
I trust LQ for the security and privacy, but I don't know what can happened at other sites,
especially if an evil javascript does more invisible things as the one encountered here.
So I decided to install the NoScript extension for Firefox from now on, to feel safer on the web.
Thanks again for the quick solution you've found.

Thank you, Jeremy. Your kind words make me proud to be part of this community.

Oh, come on! That ad is a public service! I'm sure that all the linux users visiting this site welcome the opportunity to have a free virus scan of their computer performed!

As an aside, using a plugin to disable javascript isn't necessarily a good plan; some sites won't work right without javascript. I myself generally try to avoid using javascript, but sometimes my clients make me do it.

I use privoxy and then I can tailor exactly what javascript functions I will permit to work. Thus I prevent popups (and, usually, any ads at all) yet still allow things like form validation.

I realize you are being sarcastic. And the "free virus scan" probably would do no harm to a Linux computer (if you could even run it). But I would not assume that the result would be benign for a computer running MS.

I use privoxy and on most websites I leave java script disabled. Privoxy has useful filtering rules built in. But to use privoxy with the kind of flexibility you seem to be implying requires a knowledge of javascript (and "pearl style" regular expressions!) that some of us don't possess. So I don't think I would discourage people from using the noscript plugin. (I don't use it myself since I generally don't use FireFox as a browser.) Using both would not be a bad idea.

EDIT: Note that you can set the noscript plugin to differing levels of blocking for different websites.

We (users) can afford everything to avoid the exploiting of malicious scripts on our systems, but this not solve the problem from a site administration point of view. I guess (I only guess, not speaking for them) the LQ staff is mostly concerned to keep things clean, doing everything is in their power or control.