How do I verify age using jQuery?

Question

I need to validate if the age for a alcohol website. And what I need is all here. I\'m nearly there but I\'m not sure is correct . Locally doesn\'t work. I need the

Answer 1

$('.submit').click(function() { should be $('#submit').click(function() {

although there is some weird code that I don't understand and causes an error

$('input[type="checkbox"]:checked').length > 0();