dupliquer textarea

HTML

<body>
    <form>
<table cellspacing="5" cellpadding="5" border="0" width="100%" id="myTable">
            <tr>
                <td align="center" colspan="4" class="title">
                    <b>Amine's Calendar</b>
                </td>
            </tr>
            <tr>
                <td align="right" width="30%">
                    <input type="text" maxLength="10" size="10" id="w0" value=""/>
                </td>
                <td align="left" width="10%">
                    <a href="#">
                        <img src="graphics/calendar.jpg" border="0" onclick="javascript:displayCalendar('w0', event);" id="calendarImg" alt="Modifier la date" title="Modifier la date"/>
                    </a>            
                </td>
                <td align="right" width="30%">
                    <input type="text" maxLength="10" size="10" id="w1" value=""/>
                </td>
                <td align="left" width="30%">
                    <input type="button" value="Amine" onclick="displayCalendar('w1', event);"/>
                </td>
            </tr>
          
        </table>
        <div id="calendar"></div>
                        </form>
                        </body>

JavaScript

//$('#mytable tbody>tr:last').clone(true).insertAfter('#mytable tbody>tr:last');
$('#myTable').append('<tr><td>test</td><td>test</td></tr>');