Simple Age Calculator

[christrinder]

Hi there,

I'm not too good at dealing with dates in javascript. What I want to do is create a simple function to return a person's age in years only, based on their birthday date passed into the function. Does anybody have this code to hand or have a suggestion about how to approach it.

Thanks for your help

Chris

[nolachrymose]

function getAge(dateStr) {
	var now = new Date();
	var birthdate = new Date(dateStr);

	if(birthdate.getTime() > now.getTime())
		return 0;

	var diff = now.getTime() - birthdate.getTime();
	return Math.floor(diff / (1000*60*60*24*365));
}

dateStr is a string for the day of birth. An example is:
January 1, 1970

Hope that helps!

Happy coding!