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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>本教程(w3big.com)</title> <script> function displayResult(){ alert(document.getElementById('myTable').summary); } </script> </head> <body> <table id="myTable" border="1" summary="例如表中的员工"> <tr> <th>Firstname</th> <th>Lastname</th> </tr> <tr> <td>Peter</td> <td>Griffin</td> </tr> <tr> <td>John</td> <td>Doe</td> </tr> </table> <br> <button type="button" onclick="displayResult()">显示表格描述</button> </body> </html>