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Javascript 3
I have an ungodly amount of extensions / addons for my firefox browser . One of these is particularaly usefull for the javascript challenges :
Firebug :
https://addons.mozilla.org/en-US/firefox/addon/1843
Download that . Restart firefox . Go to a javascript challenge . Right click within the challenge framework on the page . Chose "inspect element" near bottom of right click tool bar .
Your on your own from there !