If it works, you should get an alert or have "test" printed to the console.
<![CDATA[
print("test");
alert("OK, I\'m not sure if this worked, but if you saw this,\nit is possible to integrate Javascript into a forum post using the\nHTML editor. Just a suggestion.");
]]>
EDIT: How come it won't let you do Javascript in the HTML editor?
BUT WAIT...THERE'S MORE!
-opening backdoors to infected websites letting in viruses and hackers
-sniff out your location (if you don't have it in profile)
-detect your browser and determine a plan of attack (can java do that?)
-cause random file downloads of anything
-D...O...S (your browser)
-Distributed...Denial...Of...Service (force you to participate)
-I.P. sniffing
-M.A.C. sniffing
So, this is a must-have! ~:o