Netscape 6.x or 7.x under Windows, Macintosh OS, or Linux
Under the "Edit" menu click "Preferences." A dialog box will appear. In the left-hand pane, select "Advanced." In the right-hand pane, make sure the box beside the words "Enable Java" is checked.

Internet Explorer 5.x and 6.x under Windows
Under the "Tools" menu click "Internet Options". A dialog box will appear. Select the "Security" tab. Under "Security level for this zone" click the "Custom Level" button. Another dialog box will pop up. Scroll down to the Microsoft VM section. If "Disable Java" is selected, select "Medium safety" instead. Click "OK" in both dialog boxes.

Internet Explorer 4.x and 5.x under Macintosh OS
Under the "Edit" menu click "Preferences." A dialog box will appear. In the left-hand pane, if the triangle beside "Web Browser" is pointing right, click the triangle so it points down. Select "Java" in the left-hand pane. Then, in the right-hand pane, make sure the box beside the words "Enable Java" is checked.