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.
Apple Safari
On the web browser menu click on "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.