Sometimes for some reason you need to disable or enable javascript. If you’re adding JavaScript to your pages, it’s a good idea to view your pages with JavaScript disabled, so you can get an idea what users without JavaScript enabled browsers would see. Or you will have to enable javascript in order not to loose some of the web page functionality.
Here are the step-by-step instructions for majority of the browsers:

• Internet Explorer

1. Select ‘Tools’ from the top menu
2. Choose ‘Internet Options’
3. Click on the ‘Security’ tab
4. Click on ‘Custom Level’
5. Scroll down until you see section labled ‘Scripting’
6. Under ‘Active Scripting’, select ‘Enable’ and click OK

• Mozilla Firefox

1. Select ‘Tools’ from the top menu
2. Choose ‘Options’
3. Choose ‘Content’ from the top navigation
4. Select the checkbox next to ‘Enable JavaScript’ and click OK

• Apple Safari

1. Select ‘Safari’ from the top menu
2. Choose ‘Preferences’
3. Choose ‘Security’
4. Select the checkbox next to ‘Enable JavaScript’

Upgrading your browser or installing new security software or security patches may affect your settings.