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源代码：
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<!DOCTYPE html> <html> <head> <script> function displayResult() { document.getElementById('tr2').vAlign="top"; } </script> </head> <body> <table width="50%" border="1"> <tr id="tr1"> <th>Firstname</th> <th>Lastname</th> <th>Text</th> </tr> <tr id="tr2"> <td>Peter</td> <td>Griffin</td> <td>Hello my name is Peter Griffin. I need a long text for this example. I need a long text for this example.</td> </tr> </table> <br> <button type="button" onclick="displayResult()">Top-align content</button> </body> </html>
运行结果
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