Is there any way to insert proper coding at the style level to do this? I know that ubb.c has a code to show who's online and I'm needing some help to do this too.

I guess I don't understand the question at all.
There is a who's online island at the left here.
You can click on it for more details.
Also when viewing a post like this one.Or viewing the user list.
Next to your name is a mood smiley that will be grayed out if you are offline.