In order to allow our friendly staff to see your screen during a live chat session, you'll need to have the Java plugin enabled. On Leopard and Snow Leopard (OS X 10.5 and 10.6) Java was installed automatically, but on Lion you have to install it, yourself.
Luckily, it's easy.
1. Launch Java Preferences
In your Finder, head to Applications>Utilities, where you'll find "Java Preferences". Double-click on "Java Preferences"
2. Install Java
Most Lion users will see this message:
Click "install". The installation will take a couple of minutes:
and will inform you when it is done (at which point you should click "ok"):
3. Enable the plugin
Now, if the Preferences panel doesn't automatically open, double click on "Java Preferences", again, like you did in step 1, above. The Preferences pane will then open, and you can check "enable" at the top:
You will need to quit your web browser (i.e. Safari or Firefox) and re-open it for these changes to take effect.