How to vote for minecraft for multiple times a day?

This minecraft server gives away a free rank for the top voter of the month but i can't vote everyday continuously because i have school, is there any other way i can vote more than once per day?
Thanks!
Btw i think it reconizes my ip because it said ip already voted Thanks

Just vote once a day when you get home.

Not that hard to get home and vote. It only takes 5-10 minuts. :|

Only option is to either vote 1 time per day. Unless if you have more time in your hands, then maybe you can vote more. Sorry.