To enable JavaScript for Google Chrome on Mac OS X:

  1. Go to the Chrome menu and select Preferences.
  2. Select the tab Under the Hood.
  3. Under Privacy, click Content Settings.
  4. Select the JavaScript tab and choose the option Allow all sites to run JavaScript.
  5. Close the window.
  6. Refresh your browser, either by using the keyboard shortcut Cmd+R or by using the Reload button in the toolbar.

To enable JavaScript for Internet Explorer:

  1. From the Tools menu, select Internet Options.
  2. In Internet Options, click the Security tab.
  3. Click the globe labeled Internet, and then click Custom level.
  4. Scroll down to the “Scripting” section. Under Active Scripting, select either Disable, Enable, or Prompt.
  5. Press OK and restart Internet Explorer.

To enable JavaScript for Firefox:

  1. Open a new tab, and then, in the address bar, type about:config.
  2. Press Enter or Return.
  3. You’ll see a “This might void your warranty!” warning. Click I’ll be careful, I promise! to continue.
  4. In the search bar, enter javascript.enabled, and then, in the search results, under “Preference Name”, locate javascript.enabled.
  5. Right-click (Windows) or Ctrl-click (OS X) javascript.enabled, and then select Toggle to change its “Value” entry to true (enabled) or false (disabled).
  6. When you’re finished, close the “about:config” tab.

To enable JavaScript for Safari:

  1. From the Safari menu, select Preferences.
  2. Click Security.
  3. Check or uncheck the Allow Java or Enable JavaScript box.
  4. Restart your browser