javascript in iceweasel

[Bob Holtzman <holtzm@cox.net>]

Running Wheezy 7.8 w/ iceweasel 31.5.3. Some sites won't work, telling
me I need to install/activate javascript. Not sure how to do this. I
assume java is loaded because I see some icedtea 6  packages installed.
No idea how to activate javascript, assuming it's lurking on the HD.
Searches turned up virtually nothing useful. The few relevant hits
talked about going to Tools -> Options which doesn't exist on my copy.

Any pointers appreciated..  

-- 
Bob Holtzman
A fair fight is the result of poor planning.