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JS 参考手册
HTML DOM Caption 对象
tryjsref_caption_get
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<!DOCTYPE html> <html> <head> <style> table, th, td { border: 1px solid black; } </style> </head> <body> <h3>如何访问 CAPTION 元素的演示</h3> <table> <caption id="myCaption">每月储蓄</caption> <tr> <th>Month</th> <th>Savings</th> </tr> <tr> <td>January</td> <td>$100</td> </tr> <tr> <td>February</td> <td>$50</td> </tr> </table> <p>单击按钮将标题的颜色设置为红色。</p> <button onclick="myFunction()">试一试</button> <script> function myFunction() { var x = document.getElementById("myCaption"); x.style.color = "red"; } </script> </body> </html>