$("#datepicker").datepicker( "setDate", "<?php echo getCurrentDate() ?>");
        $('#diatheseis').validate({
        });

        $('input[id^="datepicker"]').each(function () {
          $(this).rules("add", {
            checkValue: true
          });
        });

        jQuery.validator.addMethod("checkValue", function (value, element) {
          var dateRegex = /^(?=\d)(?:(?:31(?!.(?:0?[2469]|11))|(?:30|29)(?!.0?2)|29(?=.0?2.(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00)))(?:\x20|$))|(?:2[0-8]|1\d|0?[1-9]))([\/])(?:1[012]|0?[1-9])\1(?:1[6-9]|[2-9]\d)?\d\d(?:(?=\x20\d)\x20|$))?(((0?[1-9]|1[012])(:[0-5]\d){0,2}(\x20[AP]M))|([01]\d|2[0-3])(:[0-5]\d){1,2})?$/;
          var response = dateRegex.test(value);
          if (value)
            return response;
          else
            return true;
        }, "Μη αποδεκτή ημερομηνία");