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<!DOCTYPE html> <html> <head> <style> table, th, td { border: 1px solid black; } </style> </head> <body> <h3>如何访问 TFOOT 元素的演示</h3> <table> <thead> <tr> <th>标题 1</th> <th>Header 2</th> </tr> </thead> <tbody> <tr> <td>Cell 1</td> <td>Cell 2</td> </tr> <tr> <td>Cell 3</td> <td>Cell 4</td> </tr> </tbody> <tbody id="myTFoot"> <tr> <td>Footer 1</td> <td>Footer 2</td> </tr> </tbody> </table> <p>单击该按钮可更改 TFOOT 元素的样式。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myTFoot"); x.style.color = "red"; } </script> </body> </html>