I have an iFrame on the contact that has a button to run a script from the parent form. It works on 2011 but when I put it in 2016 I get Object doesn't support property or method.
I have tried prefacing the function with parent , window, parent.window and window.parent. I have also added window. to the function on the parent form.
I have tested in 2015 and it seems to work there as well.
Does 2016 handle iframes in a different manner?