Click in the upper menu on Tools / Options. Here choose Enable JavaScript and click OK. Click in the upper menu on Tools / Internet Options. There click at the menu Security either on Medium, or choose Custom Level and then activate below Scripting the point Enable Active Scripting. Confirm by clicking OK. Click in the upper menu on Edit / Preferences. At Advanced / Scripts & Plugins choose Navigator. Now click on OK. Click in the upper menu on Tools / Preferences. At Multimedia choose Enable JavaScript and click OK