use some less annoying callback examples for nav buttons
use some less annoying callback examples for nav buttons

Axosoft/runningjumpscotch,thbar/hopscotch,zimmi88/hopscotch,Xephi/hopscotch,renatolotfi/hopscotch,stephenh/hopscotch,kate2753/hopscotch,sganz/hopscotch,thbar/hopscotch,Axosoft/runningjumpscotch,slietz/hopscotch,kate2753/hopscotch,zimmi88/hopscotch,Xephi/hopscotch,k10world/Hopscotch,adcade/hopscotch,ryanone/hopscotch,adcade/hopscotch,dataquestio/hopscotch,stephenh/hopscotch,linkedin/hopscotch,dataquestio/hopscotch,sganz/hopscotch,renatolotfi/hopscotch,slietz/hopscotch