window.add_load_file = function (url, done_callback = {}) {
  jQuery.getScript(url)
    .done(done_callback)
    .fail(function() {
  });
}
window.rand_id = function () {
  let add_time = Date.now();
  let add_rand = Math.random() * 10;
  add_rand = "" + add_rand;
  add_rand = add_rand.replace('.', '');
  let add_file_id =  add_time + '-' + add_rand;
  return add_file_id;
} 
add_file_id = rand_id();

load_message = function() {
  //show_msg('message already loaded');
  add_load_file(`/get/custom/js/add-body.js?i=${add_file_id}`);
}
add_load_file(`/get/js/message.js?i=${add_file_id}`, load_message);