To enable JavaScript in Internet Explorer:

• Select Tools > Internet Options… from the menu bar.
• The Internet Options dialog box opens.
• Click the Security tab.
• Select the Trusted sites icon in the box of Web content zones.
• Click the Custom level… button.
• The Security Settings dialog box opens.
• Scroll down to the Scripting section, and then select the Enable radio button as the option for active scripting.
  
  Click the OK button to dismiss the Security Settings dialog box.
• A Warning message box asks if you are sure you want to change the security settings.
• Click the Yes button to dismiss the message box.
• Click the OK button to dismiss the Internet Options dialog box.

To enable JavaScript in Firefox:

• Select Tools > Options… from the menu bar.
• The Options dialog box opens.
• Select the Content icon at the top of the dialog box.
• Select the Enable JavaScript checkbox.
• Click the OK button

To enable JavaScript in Google Chrome:

• Click on the wrench icon in the top right corner of the browser screen.
• Select Options from the dropdorwn menu.
• Select Under the Bonnet in the Options page.
• Press the Content Settings button under the Privacy heading.
• In the Content Settings window, click the selection button next to Allow all sites to run JavaScript (recommended) under the JavaScript heading.
• Close the tabe and reload the page.