Hi, I am Max, Father of 2 girls and a boy and husband of Sibel.
I'm a tech enthousiast and was working as a softwaredeveloper before my brain damage due to a neuroborreliosis.
Right now I'm interested in indieweb, php, node, genealogy, ukuleles and building them.
Othman Ouahbi has a very nice example on his blog on creating automatic updating select-boxes with Ajax.
If you change the first select-box, it updates the next selectbox accordingly.