datepicker field null as default

[daijames]

I have a form which has a datepicker attached to a field, at present it defaults to NOW() and people are not filling it in and the form submits I need it to be null so the form would fail validation if no date is entered  OR it must be greater than today  would be ok

Here is the JS that manages the field

******************************************************attached

 

 

calender.txt