document.writeln('<tr>');
document.writeln('  <td height="20" colspan="2" align="left">市场价：￥668</td>');
document.writeln('</tr>');
document.writeln('<tr>');
document.writeln('  <td height="20" colspan="2" align="left">会员价：￥438</td>');
document.writeln('</tr>');