Some recipes for turning JavaScript ON are:
In Microsoft Internet Explorer, click TOOLS, then INTERNET OPTIONS...
(or on old versions, click VIEW, then INTERNET OPTIONS...)
Click SECURITY, scroll down to SCRIPTING, and turn on ACTIVE SCRIPTING.
In Mozilla Firefox, click EDIT, then click PREFERENCES...,
then click CONTENT.
The box ENABLE JAVASCRIPT needs to have a tick in it.
In Opera, v6 and higher, click FILE, then click QUICK PREFERENCES.
Tick the option ENABLE JAVASCRIPT.