W3School TIY
编辑您的代码：
<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>
查看结果: