After you click it, if the text is showing OK, then assume JavaScript is running OK.
If the text never appears, then JavaScript is not running. It may have been deliberately turned off as a security precaution.
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 Netscape Navigator, click EDIT, then click PREFERENCES...,
then click ADVANCED.
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.
In Mozilla FireFox, click here.