When I leave my laptop on overnight.. I wake up and my internet connection
has been disconnected.  What is the reason for this?  I have my instant
messanger on and when I wake up its been disconnected, how can I keep this
from happening.  I guess I want to let the laptop shut down and conserve
power, but I want it to keep everything running like it does on the desktop.  
Any help will be appreciated.

Thanks