Follow the steps listed for your browser.

Internet Explorer
  1. Select the "Tools" --> "Internet Options" menu
  2. Select the "Security" tab.
  3. Click the "Custom Level" button
  4. Select the "Scripting" --> "Active Scripting" --> "Enable" button
Netscape and Mozilla
  1.Select the "Tools" --> "Options" menu
  2.Select the "Web Features "
  3.Select the "Enable Javascript" check box.