Countdown Timer until specified Date-Time: Start a countdown to a time defined in forms

This object can start a countdown to a time defined in forms.

It can take a given time for the end of a countdown from form inputs that define the year, month, day, hour, minute and second.

The object can also take the end time from static page elements with identifiers that start with a given prefix.

The object can start the countdown and keep updating page elements that show the remaining time to the end.