1. Click on Tools (small gear shaped icon at the top right of the page)
  2. Click on "Internet Options"
  3. Select the "Security" tab
  4. Select the "Custom Level" button (double-check what network is selected.  You will be changing the settings for the network that is currently selected.)
  5. Scroll down to the setting that reads "Scripting of Java applets"
  6. Check the "Enable" button to enable Java in Internet Explorer.  Check the "Disable" Button to turn off Java in Internet Explorer.