Javascript

The process for enabling javascript depends on which browser you are using:

Internet Explorer 5.x/6.x/7.x/8.x
Select Tools | Internet Options menu item from the main menu.
Change to the Security tab at the top of the Internet Options window that pops up.
From the list of zones at the top of the Security options select the internet icon.
Select the button near the bottom that reads Custom Level.
In the new window that pops up, scroll down to the item that reads Active Scripting.
Select the option marked Enable.

Internet Explorer 5.x (Macintosh)
Select the Preferences menu item in the Edit menu (Mac OS X users select from the Explorer menu).
Click on the Web Browser tab. Click on the Web Content bullet item.
Make sure the Enable Scripting box is checked in the Active Content section.

Internet Explorer 4.x
Select the View | Internet Options menu item from the main menu.
Change to the Security tab at the top of the Internet Options window that pops up.
From the list of zones at the top of the Security options select the internet icon.
Select the button near the bottom that reads custom and click on the settings button.
In the new window that pops up, scroll down to the item that reads Active Scripting.
Select the option marked Enable.

Mozilla Firefox
Select Tools | Options... from the main menu.
Select Web Features from the left panel of options.
Select "Enable JavaScript." (You do not need to enable Java, but it is OK if you do.)

Netscape 6.x/7.x (Mozilla 1.x)
Select Edit | Preferences menu item from the main menu.
Click on the Advanced label displayed in the list of options on the left hand side of the Preferences window that pops up.
On the right hand side select the checkbox marked Enable Javascript for Navigator.

Netscape Communicator 4.x
Select Edit | Preferences menu item from the main menu.
Click on the Advanced label displayed in the list of options on the left hand side of the Preferences window that pops up.
On the right hand side select the checkbox marked Enable Javascript.

Opera 6.x/7.x
Select File | Preferences... from the main menu.
Click Multimedia.
Under the "JavaScript" heading, select "Enable JavaScript."