Allow me to explain...
Originally, I had one form with the calendar in and other elements and all worked fine. Now I need to split up the form into parts, but these are still called by the same form name.Unfortunately the calendar has now stopped working, giving either an error of 'no target control' or just not loading up.
Any ideas why and what I should do?
Does splitting form into parts with same name means that you have several forms on the same page having the same name?
If so, then try giving them different names modifying calendar initialization accordingly.