返回表格中单元格之间的距离

<table id="myTable" border="1" style="border-spacing:10px;">

  <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()">返回表格中单元格之间的距离</button>

<script>

  function myFunction() {

    alert(document.getElementById("myTable").style.borderSpacing);

  }

</script>