// JavaScript Document
function countdown(){	
	if (document.getElementById('date_year') != null){
		var year = document.getElementById('date_year').value;
	}
	if (document.getElementById('date_month') != null){
		var month = document.getElementById('date_month').value - 1;
	}
	if(document.getElementById('date_day') != null){
		var day = document.getElementById('date_day').value;
	}	
	var futuro = new Date (year,month,day,00,00);
	var actualiza = 1000;
	var ahora = new Date();
	var faltan = futuro - ahora;
	if (faltan > 0){
		var segundos = Math.round(faltan/1000);
		var minutos = Math.floor(segundos/60);
		var segundos_s = segundos%60;
		var horas = Math.floor(minutos/60);
		var minutos_s = minutos%60;
		var dias = Math.floor(horas/24);
		var horas_s = horas%24;
		document.getElementById('days').value = dias;
		document.getElementById('hours').value = horas_s; 
		document.getElementById('minutes').value = minutos_s;
		document.getElementById('seconds').value = segundos_s;
		setTimeout("countdown()", actualiza);
	}
	else {
		
		return true;
	}
}