If you're not using motiongallery2.js on your page, I recommend just removing it to fix that error. For the first, you may want to remove the relevant script as well if it's not in use.
Error: $("#my-list") is undefined
Source File: http://www.caixadaweb.com/pitagoras/contactos.php
Error: crossmain is null
Source File: http://www.caixadaweb.com/pitagoras/js/motiongallery2.js