W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<html> <head> <script type="text/javascript"> function changeWidth() { document.getElementById("td1").width="200px"; } </script> </head> <body> <table border="1"> <tr> <th>Firstname</th> <th>Lastname</th> </tr> <tr> <td id="td1">Peter</td> <td id="td2">Griffin</td> </tr> </table> <br /> <input type="button" onclick=changeWidth() value="Change width" /> </body> </html>