var serviceUrl = document.currentScript.getAttribute('serviceurl');
var siteId = document.currentScript.getAttribute('siteid');
var postId = document.currentScript.getAttribute('postid');
var remark42Host = document.currentScript.getAttribute('remark42host');

function ajax(url, type, payload) {
    if (payload === undefined) {
      payload = null;
    }
    return new Promise(function (resolve, reject) {
      var xhr = new XMLHttpRequest();
      xhr.onload = function () {
        resolve(this.responseText);
      };
      xhr.onerror = reject;
      xhr.open(type, url);
      xhr.send(payload);
    });
  }