Thanks folks. But there are many people who say "Oh I can never work these things out" and a diary (most I see) don't tell me anything about which number a (say) Tuesday is in the month - eg third or last.

YOU can count but who surfs with a diary in there hand - apart from single digit typists. AND as I said not every one thinks to click the clock even though it is staring them in the face. Its a clock innit? not a diary.

I always reckon that IQ is related to speed. posting here we think the problem through, looking for a session is not an IQ test - so we don't (statistical average "we") focus on the how. Cue a hyperlink that says "here, I dun the thunking for ya".

GtD I will cogitate on your data. My added problem is that I do not want to use Java later than 1.1 (1.0 is the target) for backwards compatibility.