Table的行列合并

    <table border="1" width="200" height="200">
      <tr>
      <td rowspan="3" ><img src="images/book1.jpg"></img></td>
      </tr>
      <tr >
      <td><img src="images/book2.jpg"></img></td>
      </tr>
      <tr>
      <td ><img src="images/book3.jpg"></img></td>
      </tr>
      
      
      <tr>      
      <td colspan="2" ><img src="images/book4.jpg"></img></td>
      </tr>
      </table>