Internet Explorer on Windows operating system:

1. In the Tools drop-down menu, select Internet Options.

2. Next, select the Security tab.

3. Then, select the Earth (Internet) icon.

4. Then select the Custom Level button.

5. Locate Scripting near the bottom of the list.

6. Under Active Scripting, select Enable, and then click OK.

7. Answer Yes to the following conformation box.

8. Click OK to close the Internet Options window.

9. Finally, click refresh on your browser window to view the page with JavaScript enabled.

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Chrome on Windows operating system:

1. Select Customize and control Google Chrome (the icon with 3 stacked horizontal lines) to the right of the address bar.

2. From the drop-down menu, select Settings.

3. At the bottom of the page, click Show advanced settings.

4. Under Privacy, select the Content settings button.

5. Finally, under the JavaScript heading, select the Allow all sites to run JavaScript radio button.

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Safari on Mac operating system:

1. Select the Safari menu item from the Apple/System bar at the top of the screen.

2. From the drop-down menu, select Preferences.

3. Select the Security icon/tab at the top of the window.

4. Then, check the Enable JavaScript checkbox under the Web content category.

5. Close the window to save your changes.

6. Finally, refresh your browser.

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Chrome on Mac operating system:

1. Select the Chrome menu item from the Apple/System bar at the top of the screen.

2. From the drop-down menu, select Preferences.

3. On the left, select Settings.

4. At the bottom of the page, click Show advanced settings.

5. Under Privacy, select the Content settings button.

6. Finally, under the JavaScript heading, select the Allow all sites to run JavaScript radio button.