Including custom javacript functions

HelloThe question is: can I make Lectora to include my custom javascript functions definitions in html output? Can I have it done with the Lectora interface, or do I have to manually modify html output? The problem would then arise - I'd have to call those js functions in lectora GoTo Web Adress action that would be invisible for Lectora (since not yet added)- it could result with pre-publish errors. (Not to mention additional hassle of replacing js files after each publish).Thanks a lot.