How to enable JavaScript in your browser...

Internet Explorer 6

Click on the Tools menu and then Internet Options.
Tap the Security tab.
Select the Internet zone.
Click on Custom Level ...
Get up then heading called Scripting.
In the first sub-heading called Active Scripting.
Make sure that Enable is selected.
Confirm changes by pressing OK.

Internet Explorer 7

Click on the Tools menu and then Internet Options
Click the Security tab.
Select the Internet zone
Click on
Custom level ...
In the Windows Security Settings - Internet Zone, scroll down and under ASP, select Enabled 
Confirm by clicking on OK
Answer Yes in dialog box
Click on OK to finish

Internet Explorer 8

Click on the Tools menu and then Internet Options
Click the Security tab.
Select the Internet zone
Click Custom level...
In the Windows Security Settings - Internet Zone, scroll down and under Scripting, subheading ASP, select Enabled
Click on OK to confirm
Answer Yes in dialog box
 

Firefox 3.5

Click on the Tools menu and then Options ...
In dialog box, select the register Content
Check Enable Java Script

Chrome

In Customize and control Google Chrome , click on  Options 
Select on Advanced Options tab
Under Network click on Change Proxy Settings
Select Security tab
Click on Custom Level ...
In the window Security Settings - Internet Zone , under the heading Scripting , select the check box Enabled , including the heading Scripting of Java Applets, then click OK to close the Settings window Security - Internet Zone
Click on OK to close Google Chrome

Safari

Click on the menu and then click on Preferences...
In the Security tab, check Enable JavaScript