quick east bot

i need a very quick bot made that will vote for one of my clients in a web based contest that is not IP specific. I can vote multiple times if I clear my cookies. So I just need a bot to run and do it for me. It needs to be done in 24 hours and allow me to pre-set how many votes it will rack up. I am on a MAC running OSX so it must work in that format. I will transfer money via PAYPAL when it's up and working.