I am having a problem with calculating time. I can calculate the difference
in hours over midnight, but what I can't do is not get a value to appear
when I have only put in one number...For instance. I put in the time I
start, and in my hours it shows midnight minus those hours without me
putting in an ending value for hours worked.. Is there anyway to get this
to show an error if they only put in a start time and no quit time?
Hopefully this makes sense to someone out there. Any information anyone
can give would be helpful.

Thanks