function ValidateBirthday(val, args) {
	function isDate(day, month, year) {
		if (day==0 && month==0) return true;
		var dayobj = new Date(year, month - 1, day)
		return !((dayobj.getMonth() + 1 != month) || (dayobj.getDate() != day) || (dayobj.getFullYear() != year));
	}

	args.IsValid = false;
	var month = $("[id$='_BirthdayMonthDropDownList']").val();
	var day = $("[id$='_BirthdayDayDropDownList']").val();

	args.IsValid = isDate(day, month, 1900);
}