Javascript : Activating in Browsers

JavaScript(JS):
Almost all the modern browsers have built-in support for JavaScript.
User may need to enable or disable this support manually.

Google Chrome ->
       Step 1 - Customize and Control Google Chrome(top-right corner three parallel line)
       Step 2 - Go to 'Settings'.
       Step 3 - Click on Show advanced Settings
       Step 4 - Under Privacy you will find 'content settings..' click on it
       Step 5 - You will find 'Javascript' option . Select as required and click on 'Done'

Internet Explorer ->
       Step 1 - Open the 'Tools' menu. After that,
       Step 2 - Select 'Internet Options' at the bottom of the menu.
       Step 3 - Click on the 'Security' tab and then
       Step 4 - Select 'Custom Level'.
       Step 5 - Scroll down the security settings menu and
       Step 6 - Look for the heading 'Scripting'.
       Step 7 - Under 'Active Scripting', check the box next to 'Enable'. Then, click the 'OK' button.
       Step 8 - A window will appear asking for confirmation. Just select 'Yes' and JavaScript will be
                    enabled.

Mozilla Firefox ->
       Step 1 - Go to 'Tools' menu, and choose 'Options'.
       Step 2 - In the 'Options' menu, Click on 'Content' tab.
       Step 3 - Look for the 'Enable JavaScript' option.
       Step 4 - Check the box next to the option and then click the 'OK' button at the bottom.

Apple Safari ->
       Step 1 - Select 'Edit' on the browser menu and then click on 'Preferences'.
       Step 2 - Go to the 'Security' section.
       Step 3 - Under 'Web Content', there is an 'Enable JavaScript' option.
       Step 4 - Check the box next to it to turn on JavaScript.