返回 borderCollapse 属性 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
  <style>
    td,
    th {
      border: 1px solid black;
    }
  </style>
</head>
<body>

  <table id="myTable" style="border-collapse:collapse;">
    <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 border-collapse</button>
  <script>
    function myFunction() {
      alert(document.getElementById("myTable").style.borderCollapse);
    }
  </script>

</body>
</html>
        