Using jQuery 1.x
ImpressPages adds jQuery 2.x by default. You can't change that in admin mode as the management won't work. But you can remove it or replace with an older version for your public visitors if you like.
Here is an example that shows the code that can be added just before ipJs() function to replace original jQuery version
'debugMode' setting in config.php file has to be set to 1. Otherwise, the removal of original jQuery won't work.