<html>
<head>
<script>
function aboveFrames()
{
document.getElementById('myTable').frame="above";
}
function belowFrames()
{
document.getElementById('myTable').frame="below";
}
</script>
</head>
<body>
<table id="myTable">
<tr>
<td>100</td>
<td>200</td>
</tr>
<tr>
<td>300</td>
<td>400</td>
</tr>
</table>
<br>
<input type="button" onclick="aboveFrames()" value="Show above frames">
<input type="button" onclick="belowFrames()" value="Show below frames">
</body>
</html>