JS method to implement date addition and subtraction_javascript skills

Effect: molding date - age = required test date!

Event:

The event is triggered when the molding date text box is changed!
The event is triggered when the age text box is changed!
Code:
(Description: Molding date ID: tbcxrq Age ID: tblq Required test date ID: tbyqsyrq)

Copy code The code is as follows: