To enable Javascript in IE9 do the following:
1. Click on the "Tools" icon. (Tools icon is on the top right-hand corner of IE9, or Tools can also be found on the Menu bar as "Tools").
2. Then click -> Internet Options" -> Security tab -> Custom Level button -> Scroll to the "Scripting" section near the bottom, and under "Active scripting" select Enable.
3. Click OK.
Now just close down IE9 completely, and restart a new instance of IE9 for javascript to get enabled and start working.