submitjs

$('#submit-btn').click(function({
  $.ajax({
    dataType: 'jsonp',
    url: 'https://(your-subdomain).recurly.com/jsonp/(your-subdomain)/subscribe',
    data: {
      signature: signature,
      billing_info: {
        first_name: 'Ned',
        last_name: 'Stark',
        address1: '1234 Winterfell Rd',
        state: 'UT',
        city: 'Winterfell',
        zip: '84098',
        country: 'US',
        number: '4111111111111111',
        year: '2015',
        month: '4',
        verification_value: '123',
      },
      account: {
        first_name: 'Ned',
        last_name:  'Stark',
        company_name: 'House of Stark',
        email: '[email protected]'
      },
    },
    success: function (data) {
      // do stuff
    },
  });
});