console 命令行工具 X clear

console

function alignCell()
{
document.getElementById('td1').align="right"
}

<table border="1"> 
  <tbody>
   <tr> 
    <th>-----名-----</th> 
    <th>-----姓-----</th> 
   </tr> 
   <tr> 
    <td id="td1">John</td> 
    <td>Adams</td> 
   </tr> 
  </tbody>
 </table> 
 <form> 
  <input type="button" onclick="alignCell()" value="对齐 'John' 单元格"> 
 </form>