<script type="text/javascript">    function doit(f, t) {        $("#tbl tr:nth-child(" + f + ")").insertAfter($("#tbl tr:nth-child(" + t + ")"));    }</script><table id="tbl">    <tr><td>1</td></tr>    <tr><td>2</td></tr>    <tr><td>3</td></tr>    <tr><td>4</td></tr></table><input type="button" onclick="doit(1, 3);" value="http://www.mamicode.com/click">