I work on JavaScript i display data on grid view using JavaScript and it display success on grid view gvResults using function GET_WORLD_BANK_LICN_DATA_REP()

so data display success on grid view gvResults using function below without any issue

my issue how to pass list of selected
P_LICNS_CURInfo[i].LICN_CIVIL_ID that have checkbox checked true from grid view to button

as separated comma to function getselected_civilid when press button btnRequestSearch

so suppose I display data and select checkbox checked for P_LICNS_CURInfo[i].LICN_CIVIL_ID as 1245,4321,7891,9918

then it will passed to function getselected_civilid() as "1245","4321","7891","9918" when press button below :

  print
  

function getselected_civilid()
  {
  }

AND code below executed when display data on grid view using JavaScript

function GET_WORLD_BANK_LICN_DATA_REP() {
  debugger
  var P_ACT_ID_LIST = $('#ddl_activities').val();
  var P_LICN_COUNT  = $('#txtcountlicense').val();
  var P_EXPIRY_YEAR = $('#txt_year').val();

  $.ajax({
    type: "POST",
    contentType: "application/json; charset=utf-8",
    url: "../BusinessLayer/WebMethods.asmx/GET_WORLD_BANK_LICN_DATA_REP",
    data: "{'P_ACT_ID_LIST':'" + P_ACT_ID_LIST + "','P_LICN_COUNT':'" + P_LICN_COUNT + "','P_EXPIRY_YEAR':'" + P_EXPIRY_YEAR + "'}",
    dataType: "json",
    beforeSend: function(xhr) {
      xhr.setRequestHeader("STicket", MYLIBRARY.ReturnTicket());

      $("#gvResults").empty();
    },
    success: function(Result) {
      CloseLoading();

      $.each(Result.d, function(key, value) {
        if (value.Status == "1") {
          if (value.P_LICNS_CURInfo != null) {
            if (value.P_LICNS_CURInfo.length > 0) {
              var rowNo = 0;
              for (var i in value.P_LICNS_CURInfo) {
                var row = " " + "" +
                  (rowNo + 1) + "" +
                  value.P_LICNS_CURInfo[i].comm_book_no + " " +
                  value.P_LICNS_CURInfo[i].LICN_COMM_NO + " " +
                  value.P_LICNS_CURInfo[i].LICN_CIVIL_ID + " " +
                  value.P_LICNS_CURInfo[i].LEGAL_STRACTURE_DESC + " " +
                  value.P_LICNS_CURInfo[i].ADDRESS_GOV_DESC + " " +
                  value.P_LICNS_CURInfo[i].MAIL + "" +
                  "";

                row = $(row).hide();
                $('#gvResults').append($(row));
                rowNo++;
                $(row).fadeIn(1000);
              }
            }
          }
        } else {
          ModelSuccessDanger('???? !!', value.StatusDesc, '0', null);
        }
      });
    },
    error: function(msg, status) {
      CloseLoading();
      if (status === "error") {
        var errorMessage = $.parseJSON(msg.responseText);
      
      }
    }
  });
}

How to get LICN_CIVIL_ID that have checkbox checked true separated comma when press button pass LICN_CIVIL_ID separated comma 1934,4332,8991,8881 to function getselected_civilid() using JavaScript ?