To enable JavaScript in Mozilla Firefox, please select the menu Tools and then click Options. In the category Content you will find the settings for JavaScript. Chek the box beside the description Enable JavaScript.
To enable JavaScript in Microsoft Internet Explorer, please select the menu Tools and click on Internet Options. In the security tab click on Internet and then on Custom level. The newly opened window now displays the Security Settings. Scroll down the menu to Scripting and to the sub menu Active Scripting; the point Enable should be selected.
To enable JavaScript in Opera, please select the menu Tools and then click Preferences. In the now newly opening menu box, please either select Enable JavaScript or choose JavaScript Options. If you select the options menu, a new window opens in which you select Enable JavaScript.