I've been disconnected
If you are disconnected while playing in a ring/cash game then any funds not in play on the table will be credited back to your balance.
If you are disconnected while playing a Cash game, the current hand will be folded and the bet amount (if any) will be lost.
You can rejoin the table by clicking on the table ID in the Lobby. If you are playing in a tournament, simply log out and back in again to be automatically reseated at the table.