表格操作

1.获取单元格内容

    

<table id="tab">
     <thead>
            <tr>
                  <th>姓名</th>
                  <th>性别</th>
                  <th>操作</th>
             </tr>
     </thead>
     <tbody>
              <tr>
                    <td>test</td>
                     <td>male</td>
                     <td>删除</td>
               </tr>
                <tr>
                    <td>test1</td>
                     <td>female</td>
                     <td>删除</td>
               </tr>
      </tbody>
</table>

  var oTab = document.getElementById("tab");

  a. alert(oTab.children[0].children[1].children[1]); 

  b. alert(oTab.tBodies[0].rows[1].cells[1]) ;                       //tHead(只能有一个), tBodies, rows, cells