Multiple Select Row With Bootstrap Modal

<!-- BOOTSTRAP -->
<link href="<?php echo base_url();?>assets/plugins/bootstrap/css/bootstrap.min.css" rel="stylesheet">


<textarea id="output" placeholder="Klik disini"></textarea>


<div class="modal fade inimodal" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel" aria-hidden="true">
  <div class="modal-dialog modal-lg">
    <div class="modal-content">
      <div class="modal-body">
          <table class="table table-bordered">
              <thead>
                  <th><input type="checkbox" id="checkall"/></th>
                  <th>Nama</th>
              </thead>
              <tbody>
                  <tr>
                      <td><input type="checkbox" class="chk" id="orang[1]" value="Abdul"/></td>
                      <td>Abdul</td>
                  </tr>
                  <tr>
                      <td><input type="checkbox" class="chk" id="orang[2]" value="Budi"/></td>
                      <td>Budi</td>
                  </tr>
                  <tr>
                      <td><input type="checkbox" class="chk" id="orang[3]" value="Cinta"/></td>
                      <td>Cinta</td>
                  </tr>
                  <tr>
                      <td><input type="checkbox" class="chk" id="orang[4]" value="Doni"/></td>
                      <td>Doni</td>
                  </tr>
              </tbody>
          </table>
          <button type="button" id="pilih" class="btn btn-primary">Selesai</button>
      </div>
    </div>
  </div>
</div>

<!-- JQUERY -->
<script src="<?php echo base_url();?>assets/plugins/jquery/jquery-1.11.3.min.js"></script>
<!-- BOOTSTRAP JS -->
<script src="<?php echo base_url();?>assets/plugins/bootstrap/js/bootstrap.min.js"></script>
<script>
$(document).ready(function(){
    $("#output").click(function(){
        $(".inimodal").modal("show");
    });

    $("#checkall").change(function(){
        if(this.checked){
            $(".chk").each(function(){
                this.checked=true;
            });
        }else{
            $(".chk").each(function(){
                this.checked=false;
            });
        }
    });

    $("#pilih").click(function(){
        var str = [], item;
        $.each($('.chk:checked'), function (index, value) {
            item = $(this).val();
            str.push(item);
        });
        var selek=str.join(',');
        alert(selek);
    var output=str.join('\n');
        $("#output").text(output);
        $(".inimodal").modal('hide');
    });
});
</script>