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<!DOCTYPE html> <html> <head> <style> table { border: 1px solid black; height: 100px; } </style> </head> <body> <table> <tr> <td id="myTd" style="vertical-align:top;">一些示例文本</td> </tr> </table> <br> <button type="button" onclick="myFunction()">返回垂直对齐</button> <script> function myFunction() { alert(document.getElementById("myTd").style.verticalAlign); } </script> </body> </html>