To re-enable Javascript for Firefox, select "Tools" from the menu at the top, then "Options, "Web Features," and check the box "Enable Javascript".

To re-enable Javascript for Internet Explorer, go to "Tools" from the menu at the top, then "Internet Options", the "Security" Tab, click the "Custom Level" button, and under the "Scripting" category enable "Active Scripting", "Allow paste options via script" and "Scripting of Java applets".

To re-enable Javascript for Netscape, go to the "Edit" menu, then "Preferences", "Advanced", "Scripts & Plugins", and check "Navigator" beneath "Enable Javascript for".

To re-enable Javascript for Safari, go to the Safari menu, then "Preferences", "Security", and check both "Enable Java" and "Enable JavaScript."