var expiration_notification = {
  zone: null,
  init: function(target) {

    this.zone = $(typeof(target) != 'undefined' ? target : 'expiration_notification');
    
    var spinner = document.createElement('img');
    spinner.setAttribute('width', '16');
    spinner.setAttribute('height', '16');
    spinner.setAttribute('src', '/images/spinner.gif');
    spinner.setAttribute('id', 'ajax_spinner');
    spinner.setAttribute('style', 'display:block;float:left');
    this.zone.appendChild(spinner);
  },
  end: function() {
    this.zone.removeChild($('ajax_spinner'));
  }
}