I am trying to make a checkbox on one form check a checkbox on another form. This is based on this link: check/uncheck checkbox based on another checkbox
Here is my simplified code
This is not working. Checking Aa does nothing to Ba.
In case I am going down the wrong path, if this can work, then I will change it so checking Aa unchecks Ba, Bb, Bc, and other checkboxes on form B. Then I want to add a function on form B so that checking any one or all checkbox(es) there will cause Aa to be unchecked.
I am at the very beginning of website design, so I appreciate your advice on the best direction to go.