折叠表格的边框 - 在线编辑器

          <table id="myTable" border="1">
  <tr>
    <th>月份</th>
    <th>储蓄</th>
  </tr>
  <tr>
    <td>一月</td>
    <td>$100</td>
  </tr>
  <tr>
    <td>二月</td>
    <td>$150</td>
  </tr>
</table>
<br>
<button type="button" onclick="myFunction()">折叠边框</button>
<script>
  function myFunction() {
    document.getElementById("myTable").style.borderCollapse = "collapse";
  }
</script>
        