​x
 
<html>
<head>
<script type="text/javascript">
function alertSummary()
  {
  alert(document.getElementById("table1").summary);
  }
</script>
</head>
<body>
​
<table id="table1" border="1" summary="Example table of employees">
<tr>
<th>Firstname</th>
<th>Lastname</th>
</tr>
<tr>
<td>Peter</td>
<td>Griffin</td>
</tr>
</table>
<br />
<input type="button" onclick=alertSummary() value="Alert table summary" />
​
</body>
</html>
​