jQuery Forum

<link href="styles.css" rel="stylesheet"  />
<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<script>
  $(document).ready(function() {
    $(".datepicker").datepicker();
  });

  $(function () {
      $("#addButton").on("click", function () {
        var newRow = $(".addrows").first().clone().addClass("newAdded");
          newRow.find(':input').val('');
          newRow.appendTo("#TextBoxesGroup");

      });
  });
</script>

<table id="TextBoxesGroup">
    <tr class="addrows">
        <td>Start Date:</td>
        <td><input type="text" name="StartDate[]"class="datepicker" value=""  autocomplete="off" size="6">
        </td>
        <td>End Date:</td>
        <td>
        <input type="text" name="EndDate[]" class="datepicker" value="" autocomplete="off" size="6">
        </td>
    </tr>
</table>

<table>
    <tr>
        <td>
            <input type="button" id="addButton" value="+" />
        </td>  
    </tr>
</table>