ajax select

<script>
  $(document).ready(function(){
    myTable = $('#mytable').DataTable({
            lengthMenu: [[25, 100,1000,-1], [25, 100,1000,"All"]]
        });
  });

  var save_method;
  var table;
  function add_user()
  {
      save_method = 'add';
      $('#form')[0].reset(); // reset form on modals
      // $('.form-group').removeClass('has-error'); // clear error class
      // $('.help-block').empty(); // clear error string
      $('#cluster').select2({
        width: '100%'
      });
      $('#myModal').modal('show'); // show bootstrap modal
      $('.modal-title').text('Add User'); // Set Title to Bootstrap modal title
  }

  function simpan()
  {
      var url;
      if(save_method == 'add') {
          url = "<?php echo site_url('Master/tambah/')?>";
      } else {
          url = "<?php echo site_url('Master/update_salesman/')?>";
      }
      // ajax adding data to database
      $.ajax({
          url : url,
          type: "POST",
          data: $('#form').serialize(),
          dataType: "JSON",
          success: function(data)
          {
              $('#myModal').modal('hide');
              alert('Success Adding/Update data');
              location.reload();
          },
          error: function (jqXHR, textStatus, errorThrown)
          {
              alert('Error adding / update data');
              location.reload();
          }
      });
  }

  function edit_user(id)
  {
    save_method = 'update';
    $('#form')[0].reset(); // reset form on modals
    // $('.form-group').removeClass('has-error'); // clear error class
    // $('.help-block').empty(); // clear error string

    //Ajax Load data from ajax
    $.ajax({
        url : "<?php echo site_url('Master/edit_salesmans/')?>/"+id,
        type: "GET",
        dataType: "JSON",
        success: function(data)
        {

            $('[name="id_user"]').val(data.submission_id);
            $('[name="USERID"]').val(data.USERID);
            $('[name="password"]').val(data.PASSWORD);
            $('[name="no_hp"]').val(data.NOHP);
            $('[name="kelurahan"]').val(data.KELURAHAN);
            $('[name="kecamatan"]').val(data.KECAMATAN);
            $('[name="kdsuper"]').val(data.KDSUPER);
            $('[name="otorisasi"]').val(data.OTORISASI);
            $('[name="level"]').val(data.LEVEL);
            $('[name="f_aktif"]').val(data.F_AKTIF);
            $('[name="target_perdana"]').val(data.TARGET_PERDANA);
            $('[name="target_rs_bulk"]').val(data.TARGET_RS_BULK);
            $('[name="target_rp_bulk"]').val(data.TARGET_RP_BULK);
            $('[name="topup_limit"]').val(data.TOPUP_LIMIT);
            $('[name="otomatis"]').val(data.OTOMATIS);
            $('[name="target_mkios"]').val(data.TARGET_MKIOS);
            $('[name="cluster"]').val(data.CABANG).select2({width: '100%'});
            $('[name="KOTA"]').val(data.WILAYAH);

            $('#myModal').modal('show'); // show bootstrap modal when complete loaded
            $('.modal-title').text('EDIT SALES'); // Set title to Bootstrap modal title

        },
        error: function (jqXHR, textStatus, errorThrown)
        {
            alert('Error get data from ajax');
        }
    });
  }
  function hapus(id)
  {
      if(confirm('Anda yakin ingin menghapus data'))
      {
          // ajax delete data to database
          $.ajax({
              url : "<?php echo site_url('Master/hapus_salesman')?>/"+id,
              type: "POST",
              dataType: "JSON",
              success: function(data)
              {
                  location.reload();
              },
              error: function (jqXHR, textStatus, errorThrown)
              {
                  alert('Error deleting data');
              }
          });

      }
  }
</script>