js修改table中td的值.

<table id="myTable">
  <tr>
    <td id="cell1">原始值</td>
  </tr>
</table>

<script>
  document.getElementById('cell1').innerText = '新值';
</script>

<table id="myTable">
  <tr>
    <td class="cell">原始值1</td>
    <td class="cell">原始值2</td>
  </tr>
</table>

<script>
  var cells = document.getElementsByClassName('cell');
  for (var i = 0; i < cells.length; i++) {
    cells[i].innerText = '新值';
  }
</script>

<table id="myTable">
  <tr>
    <td id="cell1">原始值</td>
  </tr>
</table>

<button onclick="changeValue()">点击修改</button>

<script>
  function changeValue() {
    document.getElementById('cell1').innerText = '新值';
  }
</script>

window.onload = function() {
  document.getElementById('cell1').innerText = '新值';
};