fmpq.com
源代码：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Fmpq教程(fmpq.com)</title> <style> table,th,td{ border:1px solid black; } </style> </head> <body> <h3>访问 TH 元素</h3> <table> <tr> <th id="myTh">Name</th> </tr> <tr> <td>John</td> </tr> </table> <p>点击按钮改变 TH 元素的文本。</p> <button onclick="myFunction()">尝试一下</button> <p id="demo"></p> <script> function myFunction(){ var x = document.getElementById("myTh"); x.innerHTML = "新的表头"; } </script> </body> </html>
运行结果