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.