Instructions for enabling JavaScript in Various Browsers is provided below.

The nasa.gov site requires that JavaScripts be enabled in your browser. This is done through your browser properties page. Information on how to do this in most Internet browsers is provided below. If your browser is not listed please visit the site of the company that provides your particular browser and search for "enable javascript"

Microsoft Internet Explorer 6.x

1. On the menu bar click on "Tools" then "Internet Options."
   
2. From Internet Options, select the "Security" tab.
   
3. Click Custom Level.
   
4. Scroll down to "Scripting," make sure "Active Scripting" is set to Enable.
   
5. Click "OK."
   
6. Click "Yes" or "OK" when asked, "Are sure you wish to change the security settings for this zone."
   
7. Click "OK" on the Internet Properties window.
   
8. Close all open Internet Explorer windows and then relaunch Internet Explorer.
   

Microsoft Internet Explorer 5.x

1. On the menu bar click on "Tools" then "Internet Options."
   
2. Click on the "Security" tab.
   
3. Click "Custom Level" button.
   
4. Scroll down to "Scripting," section.
   
5. Set "Active Scripting" to "Enable."
   
6. Click "OK" on the Internet Properties window.
   
7. Close all open Internet Explorer windows and then relaunch Internet Explorer.
   

Microsoft Internet Explorer 4.x

1. On the menu bar click on "View" then "Internet Options."
   
2. Click on the "Advanced" tab.
   
3. Scroll down to "Scripting," section.
   
4. Set "Active Scripting" to "Enable."
   
5. Click "OK."
   
6. Click "Yes" or "OK"
   
7. Click "OK" on the Internet Properties window.
   
8. Close all open Internet Explorer windows and then relaunch Internet Explorer.
   

Netscape Communicator 4.x

1. Select "Preferences" from the Edit menu.
   
2. Find the "Enable JavaScript" section in the "Advanced" category.
   
3. Select "Enable JavaScript ".
   
4. Click "OK."
   
5. Close all open Netscape windows and then relaunch Netscape.