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Javascript实现表格的全选框: http://www.cnblogs.com/sanshi/archive/2009/02/17/javascript_table_select_all_checkbox.html <table border="1" cellpadding="3" cellspacing="0">     <tr>         <th>             <input type="checkbox" οnclick="checkAll(this, 'item1');" />         </th>         <th>ID</th>         <th>用户名</th>     </tr>     <tr>         <td>             <input type="checkbox" class="item1" />         </td>         <td>1001</td>         <td>张三</td>     </tr>     <tr>         <td>             <input type="checkbox" class="item1" />         </td>         <td>1002</td>         <td>李四</td>     </tr> </table> function checkAll(sender, checkClass) {     var checkItems = document.getElementsByTagName('input');     for (var i = 0; i < checkItems.length; i++) {         var checkItem = checkItems[i];         if (checkItem.type === 'checkbox' && checkItem.className === 'item1') {             checkItem.checked = sender.checked;         }     } }