instance method Form#findFirstElement
Form#findFirstElement() → Element
Finds the first non-hidden, non-disabled control within the form.
The returned object is either an INPUT, SELECT or TEXTAREA element. This
method is used by the
The result of this method is the element that comes first in the document order, not the tabindex order.
This method can be called either as an instance method or as a generic method. If calling as a generic, pass the instance in as the first argument.