function _listhub_tracker(listingId, channelId, event, origChan, referrer, eventUrl) {
  try { if ((typeof _listhub_tracker_qa != 'undefined') && _listhub_tracker_qa) { event = 'QA_' + event; } } catch (err) {}
  if (origChan == undefined) { origChan = ''; }
  if (referrer == undefined) { referrer = document.referrer; }
  if (eventUrl == undefined) { eventUrl = document.location.protocol + '//tracking.listhub.net/images/event.gif'; }
  (new Image()).src = eventUrl +
     '?lid=' + escape(listingId) +
     '&cid=' + escape(channelId) +
     '&ocid=' + escape(origChan) +
     '&evt=' + escape(event) +
     '&ref=' + escape(referrer) +
     '&t=' + new Date().getTime();
  return true;
}