<!DOCTYPE html>
<html>
<head>
<style>
table, th, td { border: 1px solid black;
}
</style>
</head>
<body>
<h1>用 JavaScript 改变边框间距</h1>
<p>单击“试一试”按钮更改 TABLE 元素的 border-spacing 属性：</p>
<button onclick="myFunction()">试一试</button>
<table id="myTABLE">
<tr>
<th>Name</th>
<th>Age</th>
</tr>
<tr>
<td>Emil</td>
<td>9</td>
</tr>
<tr>
<td>Tobias</td>
<td>7</td>
</tr>
<tr>
<td>Linus</td>
<td>2</td>
</tr>
</table>
<script>
function myFunction() { document.getElementById("myTABLE").style.borderSpacing = "15px";}
</script>
</body>
</html>