How to enable or disable JavaScript support in web browsers

This applies to following browsers: 

FireFox / Chrome / Internet explorer / Safari / Opera

To enable JavaScript in Firefox 2.xx or 3.xx series

1. Open Firefox.
2. On the Tools menu, click Options.
3. Click on the Content icon.
4. Check the box next to Enable JavaScript.
5. Click the Advanced button to open the Advanced JavaScript Options box.
6. Check the boxes under Allow scripts to section that you want to allow.
7. Click OK.
8. Click OK.

To enable JavaScript in Firefox 1.xx series

1. Open Firefox.
2. On the Tools menu, click Options.
3. Click Web Features in the Options list.
4. Under the Web Features section, check the box next to Enable JavaScript.
5. Click the Advanced button to open the Advanced JavaScript Options box.
6. Check the boxes under Allow scripts to section that you want to allow.
7. Click OK.
8. Click OK.

To enable JavaScript in Microsoft Internet Explorer

1. Select Internet Options from the browser’s Tools menu.
2. Click the Security tab.
3. Click Custom Level in Security Level for this Zone.
4. Scroll down to Scripting, near the bottom of the list.
5. Under Active Scripting, choose Enable.
6. Click OK to leave Security Settings. Click OK to leave Internet Options.

To enable JavaScript in Safari

1. Select Preference from the browser’s menu.
2. Click the Security tab (with the “lock” icon).
3. Make sure the box next to JavaScript is checked.

To enable JavaScript in Opera

1. Select Quick Preferences from the browser’s Tools menu.
2. Make sure the checkbox next to Enable JavaScript is checked.

Netscape and Mozilla Suite

1. Select Preferences from the browser’s Edit menu.
2. Click Advanced on the left side of the dialog box.
3. Click the Scripts & Plugins subitem under Advanced.
4. Check the box next to Navigator.
5. Click the OK to close the Preferences dialog box.

Most of Modern Websites uses JavaScript for various purposes in their content.

Examples are to validate user input and animations.

Example : JSL Website when browsed with a browser which has Javascript disabled.