There's no guard against unparsed characters at the end of the date s…

…tring, any extra characters are just ignored

Fixes #7244 - Datepicker: parseDate() does not throw an exception for long years

tests/unit/datepicker/datepicker_tickets.js

@@ -29,4 +29,13 @@ test('Ticket 6827: formatDate day of year calculation is wrong during day lights
     equals(time, "089");
 });
 
+test('Ticket #7244: date parser does not fail when too many numbers are passed into the date function', function() {
+    expect(1);
+    try{
+        var date = $.datepicker.parseDate('dd/mm/yy', '18/04/19881');
+    }catch(e){
+        ok("invalid date detected");
+    }
+});
+
 })(jQuery);

ui/jquery.ui.datepicker.js

@@ -1082,6 +1082,9 @@ $.extend(Datepicker.prototype, {
 						checkLiteral();
 				}
 		}
+		if (iValue < value.length){
+			throw "Extra/unparsed characters found in date: " + value.substring(iValue);
+		}
 		if (year == -1)
 			year = new Date().getFullYear();
 		else if (year < 100)