code: function getItemGuid (item) {
  			function ok (val) {
  				if (val != undefined) {
  					if (val != "null") {
  						return (true);
  						}
  					}
  				return (false);
  				}
  			if (ok (item.guid)) {
  				return (item.guid);
  				}
  			var guid = "";
  			if (ok (item.pubDate)) {
  				guid += item.pubDate;
  				}
  			if (ok (item.link)) {
  				guid += item.link;
  				}
  			if (ok (item.title)) {
  				guid += item.title;
  				}
  			if (guid.length > 0) {
  				guid = md5 (guid);
  				}
  			return (guid);
  			}
docs: 6/3/15 by DW