Right; you need to compare each one and submit updates only for the changes.
This evaluation must take place either in the form action or in whatever
procedure you use for DB updates. In the form action, you can use the
DateCompare() function to evaluate the two dates. You need to spin through the
form fields, grab the date values, and plug them into the function.
hidden field from FALSE to TRUE, and issue updates only for the fields that
were changed in that manner.