If Javascript program is present on your computer but not enabled, the following is how to enable Javascript in Internet Explorer
Click Tools (on Vista and Windows 7 you need to press “Alt” for the tool bar to appear)
Click Internet options
Click Security
Click Custom Level
Scroll down the options until you reach “Scripting” (about 80% down the list)
On “active scripting” click the enable radio button.
OK, Apply, OK
All done, reload your browser.