document.addEventListener("DOMContentLoaded", function(event) {
  function setOptOutText(element) {
    _paq.push([function() {
      element.checked = !this.isUserOptedOut();
      element.disabled = false;
      (document.querySelector ? document.querySelector('label[for=optout] strong') : document.getElementById('optoutlabel')).innerHTML = this.isUserOptedOut()
        ? 'You are currently opted out. Click here to opt in.'
        : 'You are currently opted in. Click here to opt out.';
    }]);
  }

  var optOut = document.getElementById("optout");
  optOut.addEventListener("click", function() {
    if (this.checked) {
      _paq.push(['forgetUserOptOut']);
    } else {
      _paq.push(['optUserOut']);
    }
    setOptOutText(optOut);
  });
  setOptOutText(optOut);
});