W3School TIY
编辑您的代码：
<html> <head> <script type="text/javascript"> function changeRowSpan() { document.getElementById("td2").rowSpan="2"; } </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> <tr> <td id="td3">Harry</td> <td id="td4">Potter</td> </tr> </table> <br /> <input type="button" onclick=changeRowSpan() value="Change rowspan" /> </body> </html>
查看结果: