function yearbisiesto(year){
	if (year % 4 != 0) return false;
	else{
		if (year % 100 == 0){
			if (year % 400 == 0) return true;
			else return false;
		}else return true;
	}
}

function validarFecha(day,month,year){
	var submit = false;
	if(yearbisiesto(year)) febrero=29;
	else febrero=28;
		
	if (month==02){
    	if(day>febrero) return false
		else return true;
	}
	else{	
		if (((month==4) || (month==6) || (month==9) || (month==11))&& (day>30)) return false;
		else return true
	}
}