gistfile1.txt

$(document).on "change", ".paid_checkbox", ->
  url = $(this).data('paid-url')
  if $(this).is(":checked")
    box = confirm "Are you sure you want to mark as paid?"
    if box is true
      $.get url, { paid: "1"}
    else
      $(this).prop "checked", false
  else
    box = confirm "Are you sure you want to mark as unpaid?"
    if box is true
      $.get url, { paid: "0"}
    else
      $(this).prop "checked", true