Time plots in Excel 2003

Hi.
I'm trying to plot the uptime for some equipment we use, on a day and time basis.
The data I use looks like this:

A B C
Online 23:27:39 12-Oct-08
Online 23:30:54 12-Oct-08
Online 23:34:09 12-Oct-08
Online 23:37:24 12-Oct-08
Offline 23:40:37 12-Oct-08
Offline 23:43:50 12-Oct-08
Offline 23:47:03 12-Oct-08
Offline 12:00:28 13-Oct-08
Offline 12:03:41 13-Oct-08
Offline 12:06:54 13-Oct-08
Online 12:10:10 13-Oct-08
Online 12:13:26 13-Oct-08
Online 12:16:42 13-Oct-08
Online 12:19:58 13-Oct-08
Offline 12:23:11 13-Oct-08
Offline 12:26:24 13-Oct-08
Offline 12:29:37 13-Oct-08
Offline 14:51:13 13-Oct-08
Offline 14:54:26 13-Oct-08

What I need to do is to extrach the 'Online" fields and plot the time as a bar in the graph, showing the windows over a 24 hour span; plot is by dau, for 30 days.
Time would be on Y, and day/date on X.
I have no idea how I can do it, so please help if you can.
Thank you.

Thanks Andy.
It is close, but not exactly.
What I actually need is to show uptime for a day, say 13 Oct as a single entry, but broken down as the machine was online for several periods of time over the day, e.g. 02:14:32-03:01:03, 11:12:34-14:23:20, 20:15:23-01:03:17 next day.
Multiple entries in the same day. Maybe a scatter plot would work better than a bar graph.
In your example, you have hidden the Offline records, haven't you?
Would it be possible for the spreadsheet to extract only the Online records and calculate and plot the entry based on time on and time off for the particular set of data (over an Online set of recordings)?
I am aware that this complicates the matter, but any solution that works will be good.
Thanks,
Leo

Andy,
It's just too bad you took offense. I appreciate your help with the spreadsheet that works.