jQuery move bottom TR to top after set interval or on button click

Using timeout plugin from : http://benalman.com/projects/jquery-dotimeout-plugin/

 

HTML :

 

<button>Rotate</button>

<div id="announc">
<table>
<tbody>
<tr><td>header</td></tr>
<tr><td>Item 1</td></tr>
<tr><td>Item 2</td></tr>
<tr><td>Item 3</td></tr>
<tr><td>Item 4</td></tr>
<tr><td>Item 5</td></tr>
</tbody>
</table>
</div>

 

Scripting :

 

$("button").click(function(){
      
        var len = $('#announc  tr').length;
        var $first = $('#announc  tr').eq(1).closest('tr');
        var $last = $('#announc  tr').eq(len-1).closest('tr');
        $last.insertBefore($first);
       
});

 

$.doTimeout( 1000, function(){
        var len = $('#announc  tr').length;
        var $first = $('#announc  tr').eq(1).closest('tr');
        var $last = $('#announc  tr').eq(len-1).closest('tr');
        $last.insertBefore($first);
        return true;
    });