In the top right corner of your browser, click the 3 gray dots and select "Settings".

Scroll to the very bottom of the page and click "Advanced."

Under "Privacy and security" click on "Site settings...".

When the dialog window opens, look for the "JavaScript" section and turn it ON (Allow).

Click the X and close out of the window.

Refresh your page. Go back to the webpage and try adding to the Cart again.

In the address bar, type about:config and press Enter.

Click "I'll be careful, I promise" if a warning message appears.

In the search box, search for javascript.enabled

Toggle the "javascript.enabled" preference (right-click and select "Toggle" or double-click the preference) to change the value from "false" to "true".

Click on the "Reload current page" button of the web browser to refresh the page.

1. Click on Opera icon "Menu" and than "Settings".

2. Click on "Websites" and then choose "Allow all sites to run JavaScript (recommended)"

3. Click on the "Reload" button of the web browser to refresh the page.

On the web browser menu click on the "Edit" and select "Preferences".

In the "Preferences" window select the "Security" tab.

In the "Security" tab section "Web content" mark the "Enable JavaScript" checkbox.

Click on the "Reload the current page" button of the web browser to refresh the page.

On web browser menu click "Tools" icon and select "Internet Options".

In the "Internet Options" window select the "Security" tab.

On the "Security" tab click on the "Custom level..." button.

When the "Security Settings - Internet Zone" dialog window opens, look for the "Scripting" section.

In the "Active Scripting" item select "Enable".

When the "Warning!" window pops out asking "Are you sure you want to change the settings for this zone?" select "Yes".

In the "Internet Options" window click on the "OK" button to close it.

Click on the "Refresh" button of the web browser to refresh the page.

Click this link for Android cell phones.