trains from zagreb to budapest

Hello,
I'm wondering if anyone has a link to a website that has the timetables for trains going from Zagreb to Budapest. Is it possible for me to make a reservation or buy a ticket online? Would it be wise of me to do so if i am traveling in August, or not at all necessary? Thanks for any help!

Timetable for anywhere in Europe: [www.bahn.de]

Not possible to buy ticket online, but don't worry!

Buy a return ticket! A return is cheaper than one-way, because there's 60% on all return tickets between Hungary and Croatia.

www.elvira.hu