Internet Explorer
Open Internet Explorer.
Click on the Tools button (the picture of the gear) or "Tools" from the program menu.
Open from the manu the "Internet Options".
Click the Security tab.
In the "Security level for this zone" box, click on Custom level.
Scroll toward the bottom of the Settings box to Scripting.
Enable active scripting.
Click OK twice to close the dialogue.
Click the Refresh button after the Address Bar at the top of your browser, or hit F5.

Mozilla Firefox
Open Firefox.
Click on the Tools menu.
Select Options.
Click the Content tab with the Earth graphic.
Check Enable JavaScript.
Click OK.
Click Reload or hit F5.

Opera
Open Opera.
Select the Tools menu.
Select Quick Preferences.
Check Enable JavaScript
Click Reload or hit F5 to refresh the page.