<tr>
          <td><label>Date</label><input type="date" name="PostingDate[]" id="date" style="text-align: center;"class="form-control " required /></td>
  <input type="date" style="display: none;" name="AddedOn" class="KR" />
             </tr>
     <script type="text/javascript">
        var date=$("#date").val();
        $(".KR").val(date);
</script>