javascript - 如何在双击列时对其进行编辑？

Question

我正在使用表格查看一些数据，表格如下所示

<table>
    <tr>
        <th>Id</th>
        <th>Name</th>
        <th>Salary</th>
    </tr>
    <tr>
        <td>1</td>
        <td>Imthi</td>
        <td>30000</td>
    </tr>
</table>  

我想在双击该列时编辑上表中的工资列。谁能帮我实现这个目标？

Answer 1

DEMO

检查链接。使用 Ajax

----------描述------
common.php

<?php
// array OR retrieve values from database and store it as array
$EmployeeArray[1] = array('id'=>1,'name'=>'John','salary'=>30000);
$EmployeeArray[2] = array('id'=>2,'name'=>'Imthy','salary'=>20000);
?>

index.php

<script>
function editColumn(Id)
{
var params  = 'option=edit&Id=' + Id ;
var DivId = 'edit_' + Id;
ajax_function('ajax_edit.php', params, DivId);
}

function saveColumn(Id)
{
 var value = document.getElementById('salary_'+Id).value;
 var params     = 'option=save&value=' + value + '&Id' + Id ;
var DivId = 'edit_' + Id;
ajax_function('ajax_edit.php', params, DivId);
}
</script>

<?php
require_once('common.php');
?>
<table>
<tr>
    <th>Id</th>
    <th>Name</th>
    <th>Salary</th>
</tr>
<?php
foreach($EmployeeArray as $k=>$v)
{
$Id = $v['id'];
$Name = $v['name'];
$Salary = $v['salary'];
echo '
<tr>
    <td>'.$Id.'</td>
    <td>'.$Name.'</td>
    <td ondblclick="return editColumn(\''.$Id.'\');">
    <div id="edit_'.$Id.'">'.$Salary.'</div></td>
    </tr>
';  
}
?>

    </table>

ajax_edit.php

  <?php
   require_once('common.php');
   $option = isset($_REQUEST['option']) ? $_REQUEST['option'] : '';
   $Id     = isset($_REQUEST['Id'])     ? $_REQUEST['Id']     : '';

   switch($option)
  {
  case 'edit': // Display Text box
$value = $EmployeeArray[$Id]['salary'];
echo '
    <input type="text" id="salary_'.$Id.'" value="'.$value.'"  style="width:50px;" /> 
    <input type="button" value="Save" onclick="return saveColumn(\''.$Id.'\');" />';
  break;

  case 'save': // Save to Database
$value = $_REQUEST['value'];
echo $value;
  break;
  }
  ?>