How to turn JavaScript on or off in the browser basics

All modern browsers use the built-in support for JavaScript. Many times, you may need to enable or disable this support manually.

This tutorial will let you know how to enable and disable JavaScript support in your browser: IE browser, Firefox and opera.
JavaScript in Internet Explorer (IE):

The following is a simple step to turn JavaScript on or off in your Internet Explorer:

• Follow the From menu Tools-> Internet Options
• Select the Security tab from the dialog box
• Click on the "Custom Level" button
• Scroll down until you find the script options
• Select Enable Active Script radio button
• Finally click "OK" and then exit to

To disable JavaScript support in Internet Explorer, you need to select the "Disable" radio button in "Active Scripting".
JavaScript in Firefox:

Here are the simple steps to turn JavaScript on or off in Firefox:

• From the menu, follow tools-> options
• From the Contents option of the dialog box
• Select the JavaScript-enabled check box
• Finally click OK, then exit to

To disable JavaScript support for Firefox, you should select the checkbox to disable JavaScript.
JavaScript in Opera:

The following is a simple step to turn JavaScript on or off in opera:

• From the menu, follow tools-> "preferences"
• Select the Advanced option in the dialog box
• Select "Content" from the listed items
• Select the Enable JavaScript check box
• Finally click "OK" and then exit to

To disable JavaScript support in opera, do not select the JavaScript-enabled check box.
Warning for browsers that are not javascript:

If you have something important to do with JavaScript, you can display a warning message and use the <noscript> tab to display it to the user.

You can join the NoScript noscript block immediately after the script block:

Now, if the user-enabled browser does not support JavaScript or JavaScript, then </noscript> will display the message on the screen.