I am creating an interactive form in Acrobat Pro and I would like to use Drop down menu entries to change relevant check boxes automatically please? So which ever drop down selection is made will trigger the relevant check box to be ticked on the for

I am creating an interactive form in Acrobat Pro and I would like to use Drop down menu entries to change relevant check boxes automatically please? So which ever drop down selection is made will trigger the relevant check box to be ticked on the form. How do you do that with Javascript please?