function context(e) {
  if (e) t = e.target.nodeName;
  else if (event) t = event.srcElement.nodeName;
  if (t == 'IMG') {
    alert("Images Copyright (c) 2007 GeoGem International Jewelers.\n                         All Rights Reserved.");
    return false;
  } else return true;
}
document.oncontextmenu = context;