Change transaction type in event pages

change_event_transaction_type.html

<script type="text/javascript">
  // See https://salsasupport.zendesk.com/entries/33559170-Changing-transaction-type-in-an-event-page
  $(document).ready(function() {
    var eventKey = "YOUR_EVENT_KEY_HERE";
    var transactionType = "YOUR_TRANSACTION_TYPE_HERE";

    var regex = RegExp("checkout.sjs\\?event_KEY=" + eventKey);
    if (regex.test(window.location.href)) {
      var field = $('*[name=Transaction_Type]');
      if (field.length == 0) {
        $('#processPostForm').append('<input type="hidden" name="Transaction_Type"/>');
        field = $('*[name=Transaction_Type]');
      }
      field.val(transactionType);
    }
  });
</script>