Facebook updates can't always be "Like"d. I just can't understand why it show you the friends those who are offline. Its more annoying than the convenience and more like a bug. So this script will remove the offline friends from chat list making the list more convenient and clean.You just have to install this "Facebook Old Chat Sidebar".
(You need to have installed GreaseMonkey Extension to work all these scripts. Install Greasemonkey for Firefox, Chrome, Opera )
|Old Facebook ChatList|
"Facebook Old Chat Sidebar" works with Firefox, Chrome and Opera.
After you install the script, refresh your Facebook page and voila, all offline friends are really out of the list.