W3School TIY Editor
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<!DOCTYPE html> <html> <head> <style> table, th, td { border: 1px solid black; } </style> </head> <body> <p>单击按钮返回 thead 元素的 innerHTML。</p> <table id="myTable"> <thead> <tr> <th>月份</th> <th>存款</th> </tr> </thead> <tfoot> <tr> <td>合计</td> <td>$180</td> </tr> </tfoot> <tbody> <tr> <td>一月</td> <td>$100</td> </tr> <tr> <td>二月</td> <td>$80</td> </tr> </tbody> </table> <br> <button onclick="myFunction()">试一试</button> <script> function myFunction() { alert(document.getElementById("myTable").tHead.innerHTML); } </script> </body> </html>