Calculating age with JavaScript

I’ve been working on a simple form – nothing really challenging – where members of a group can provide some data about themselves for registration purposes. However I tried adding an extra function to it: a small text field next to where they input their birth data, which displays their age (according of course to the birth date they provided).

I thought therefore I could share this small piece of code so that other people wishing to add it to their websites can use it. The internet is already full of such scripts, but who knows, maybe someone finds it here and finds it useful…

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