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All my browsers suddenly don't support Javascript files anymore?

I am facing some weird problem on Windows 7. JavaScript suddenly stopped working on windows 7 on all browsers. All browsers have JavaScript enabled. I have three browsers installed IE 9 Beta, Google chrome, Firefox 3.6,

I tried disabling and enabling JavaScript again but problem persists.

How can I diagnose and correct it ?

Thanks for any help

---------------EDIT

Take example of Stack Overflow/Super User: When I click on Ask Question button, the form opens without any text formatting menu(which is I guess is loaded by JavaScript) also when I click Add Comment button, the add comment textbos does not show. Problem does not occure only for this website but also for Gmail in which text messaging does not work ...

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marked as duplicate by Tom Wijsman, random Sep 23 '11 at 14:24

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can you specify in wich browser you tried to enabling javascript? –  omnibrain Oct 11 '10 at 6:52
    
Are you testing on the same site, or are all sites' JavaScript broken? –  invert Oct 11 '10 at 8:00
    
@omnibrain: I tried enabling javascript on Firefox, Internet Explorer, Google chrome. @wez: Yes, I am testing it on Stack Overflow site, even this comment I am writing from different PC as it was not showing when I clicked Add Comment –  Xinus Oct 16 '10 at 2:43
1  
what exactly do you mean by stopped working? open chrome and type javascript:alert("hi") into the address bar. What happens? –  Pierre-Antoine LaFayette Oct 16 '10 at 17:46
    
@Pierre-Antoine LaFayette: Take example of Stack Overflow/Super User: When I click on Ask Question button, the form opens without any text formatting menu(which is I guess is loaded by JavaScript) also when I click Add Comment button, the add comment textbos does not show. Problem does not occure only for this website but also for Gmail in which text messaging does not work ... –  Xinus Oct 17 '10 at 3:00

1 Answer 1

If all browsers are affected, then my bet is: there is no more JavaScript in the source code. Like: maybe you installed some new much-too-active virus scanner that is disabling or even removing embedded JavaScript. Or some firewall software blocking access to external JavaScript files? Or maybe something is only blocking cookies, while the pages you're trying to view rely on cookies.

So:

What does a View Source give you? Can you actually download http://sstatic.net/js/master.js?a=b ?

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For it to be happening on all browsers I would –  Mokubai Oct 16 '10 at 18:34

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