向表格添加新行 - 然后添加单元格和内容 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <script>
    function insRow() {
      var x = document.getElementById('myTable').insertRow(0);
      var y = x.insertCell(0);
      var z = x.insertCell(1);
      y.innerHTML = "新单元格1";
      z.innerHTML = "新单元格2";
    }
  </script>
</head>

<body>
  <table id="myTable" border="1">
    <tr>
      <td>行1 列1</td>
      <td>行1 列2</td>
    </tr>
    <tr>
      <td>行2 列1</td>
      <td>行2列2</td>
    </tr>
    <tr>
      <td>行3 列1</td>
      <td>行3 列2</td>
    </tr>
  </table>
  <br>
  <input type="button" onclick="insRow()" value="插入行">

</body>
</html>
        