instance method Form.Element#activate
Form.Element#activate() → Element
Gives focus to a form control and selects its contents if it is a text input.
This method is just a shortcut for focusing and selecting; therefore, these are equivalent (aside from the fact that the former one will not return the field) :
Guess which call is the nicest? ;)
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.