if (sessionStorage.day == undefined) {
	sessionStorage.day = '01';
}
if (sessionStorage.month == undefined) {
	sessionStorage.month = '01';
}
if (sessionStorage.year == undefined) {
	sessionStorage.year = '1980';
}

function incDay() {
	sessionStorage.day++;
	if (sessionStorage.day > 31) {
		sessionStorage.day = 1;
		incMonth();
	}

	if (sessionStorage.day < 10) {
		sessionStorage.day = '0'+sessionStorage.day;
	}
}

function incMonth() {
	sessionStorage.month++;
	if (sessionStorage.month > 12) {
		sessionStorage.month = 1;
		incYear();
	}

	if (sessionStorage.month < 10) {
		sessionStorage.month = '0'+sessionStorage.month;
	}
}

function incYear() {
	sessionStorage.year++;
}

function submitForm(day, month, year) {
	//Тут поменяй anon на нужное имя
	$("#email").val('Anon');
	$("#dateDay").val(day);
	$("#dateMonth").val(month);
	$("#dateYear").val(year);
	document.getElementById("forgotten-password-form").submit();
}

submitForm(sessionStorage.day, sessionStorage.month, sessionStorage.year);
incDay();