XL2003, Win xp

Is there a way to find the next time in a range, where the times are
arranged randomly? So in range A1:H5 the code looks for the time after the
nominated time.

So:-
If A = 10:30AM and the next time in the range is 11:15AM then
B=11:15AM
End if
And then I would make A=11:15AM and look for the next time in the range.
And so on until I have my list

Any help would be greatly appreciated.
Ta,
Martin