正当中显示按钮

居中显示按钮td colspan2centerinput typebutton value上传 onclickupload() /inputtyp

居中显示按钮
<td colspan=2>
    <center>
       <input type="button" value="上传" onclick="upload();" />
       <input  type="button" value="关闭" onclick="javascript:window.close();"/>
    </center>
</td>