Jquery implements the example of changing table row order

The table is as follows:

<table class="table" id="test_table">
    <thead>
        <tr>
               <th> time </th>
            <th> details </th>
            <th> operation </th>
        </tr>
    </thead>
    <tbody>
        <tr cid="7.0.0-2014-04-29_11-02-24_123" class="list_line">
            <td>
                2014-04-29 11:02:24
            </td>
            <td>
                 details 
            </td>
            <td>
                <span class="move_btn glyphicon glyphicon-arrow-up" move_act="up"></span>
                <span class="move_btn glyphicon glyphicon-arrow-down" move_act="down"></span>
            </td>
        </tr>
        <tr cid="7.0.0-2014-04-29_11-02-24_915" class="list_line">
            <td>
                2014-04-28 10:00:00
            </td>
            <td>
                 details 
            </td>
            <td>
                <span class="move_btn glyphicon glyphicon-arrow-up" move_act="up"></span>
                <span class="move_btn glyphicon glyphicon-arrow-down" move_act="down"></span>
            </td>
        </tr>
    </tbody>
</table>

Js code, which adds class=danger after the change order for the lines to be changed

<script type="text/javascript">
$(function(){
  $('.move_btn').click(function(){
    var move_act = $(this).attr('move_act');
    $('#test_table tbody tr').removeClass('danger');
    if(move_act == 'up'){
      $(this).parent().parent('tr').addClass('danger')
             .prev().before($(this).parent().parent('tr'));
    }
    else if(move_act == 'down'){
      $(this).parent().parent('tr').addClass('danger')
             .next().after($(this).parent().parent('tr'));
    }
    setTimeout("$('#test_table tbody tr').removeClass('danger');", 2000);
  });
});
</script>

After the change, the new order can be submitted according to the unique mark of each line