在表格的第一位置插入一个新行 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <script>
    function displayResult() {
      var table = document.getElementById("myTable");
      var row = table.insertRow(0);
      var cell1 = row.insertCell(0);
      var cell2 = row.insertCell(1);
      cell1.innerHTML = "New";
      cell2.innerHTML = "New";
    }
  </script>
</head>
<body>

  <table id="myTable" border="1">
    <tr>
      <td>cell 1</td>
      <td>cell 2</td>
    </tr>
    <tr>
      <td>cell 3</td>
      <td>cell 4</td>
    </tr>
  </table>
  <br>
  <button type="button" onclick="displayResult()">插入新行</button>

</body>
</html>
        