<input type="button" onclick="padding()" value="改变 Cellpadding">
<html>
<head>
<script type="text/javascript">
function padding()
{
document.getElementById('myTable').cellPadding="15"
}
function spacing()
document.getElementById('myTable').cellSpacing="15"
</script>
</head>
<body>
<table id="myTable" border="1">
<tr>
<td>100</td>
<td>200</td>
</tr>
<td>300</td>
<td>400</td>