I wish I could help, Suzy, but we're going through the same thing here. We've got a webcam now and will be setting it up, but haven't done so yet.
Did your webcam come with installation software? I believe that will tell you how to set it up for online use. Are you on a Mac or a PC? I'm on a Mac, so things may be different - maybe someone else will know how to help you!
This place may help you too --
Spotlife - webcam hub[/URL]
Kell