Jquery validation Plugin example

https://jqueryvalidation.org/

=======Custom validation===========================


  $('.rvwdate').rules("add", { CompareDates: true });

    $.validator.addMethod('CompareDates', function (value, element) {

        var odate = new Date(GetDate($('#txtOriginDate').val()));

        var rdate = new Date(GetDate($('#txtReviewDate').val()));

        if (rdate < odate) {
            return false;
        }
        else {
            return true;
        }

    }, jQuery.validator.format("Review Date Should be Greater Than Origin Date"));

  $.validator.setDefaults({ ignore: ":hidden:not(select)" });

==========================

     $.validator.addMethod('SearchRole', function (value, element) {

            var selectValue = $("#select-roles").val();

            return !(selectValue == "");

        }, "The Role field is required.");


        $("#select-roles").rules("add", { SearchRole: true });