hack.js

var i = 0;

function Vote()
{
   	$.ajax({
		type: "POST",
		url: SITE_URL+"_ajax_votar.php",
		data: {'fecha':16,'tema':307},
		contentType: "application/x-www-form-urlencoded",
		dataType: "html",
		success: function(datos){
			if(datos == 'ok=1')
			{
				 i++;
				console.log('Voto #' + i + ' enviado');
			}
		}
	}); 
}

setInterval(Vote, 1000);