shortDate detection update - fixes issue #76

Author: Mottie

js/jquery.tablesorter.js

@@ -1041,8 +1041,8 @@
 	ts.addParser({
 		id: "shortDate", // "mmddyyyy", "ddmmyyyy" or "yyyymmdd"
 		is: function(s) {
-			// testing for ####-####-#### - so it's not perfect
-			return (/\d{1,4}[\/\-\,\.\s+]\d{1,4}[\/\-\.\,\s+]\d{1,4}/).test(s);
+			// testing for ####-##-#### - so it's not perfect
+			return (/^(\d{2}|\d{4})[\/\-\,\.\s+]\d{2}[\/\-\.\,\s+](\d{2}|\d{4})$/).test(s);
 		},
 		format: function(s, table, cell, cellIndex) {
 			var c = table.config, ci = c.headerList[cellIndex],