设置表格背景图片居中不重复

<table width="100%" border="0" cellpadding="0"
cellspacing="0">
  <tr>
    <td
height="245" align="center" background="images/zk0724_02_01.jpg"
style="background-repeat:no-repeat;
background-position:center"
></td>
  </tr>
</table>