浮动div水平居中

 <table border=0 cellspacing=0 cellpadding=0 style="margin:13px auto 0 auto">
             <tr>
              <td>
                        <div id="PLAY" class="c5"></div>
                        <div id="FOLLOW" class="c4"></div>
                        <div id="PLAYBACK" class="c8"></div>
              </td>
             </tr>

 </table>