Method to calculate a person's age at their next birthday.

gistfile1.js

	function getAgeNextBirthday(dateOfBirth, asOfDate) {
		var dateOfBirthyyyymmdd = dateOfBirth.getFullYear().toString() + ('0'+(dateOfBirth.getMonth() + 1).toString()).slice(-2) + ('0'+dateOfBirth.getDate().toString()).slice(-2);
		var asOfDateyyyymmdd = asOfDate.getFullYear().toString() + ('0'+(asOfDate.getMonth() + 1).toString()).slice(-2) + ('0',asOfDate.getDate().toString()).slice(-2);
		return Math.floor((asOfDateyyyymmdd - dateOfBirthyyyymmdd) / 10000) + 1;
	}