在 HTML 表中，我必須更改幾個(gè)列標(biāo)題，例如：<th class="myclass">Headline_01</th>應(yīng)該變成<th class="myclass">Nice Headline 01</th>。作為 javascript 的初學(xué)者，我可以使用以下代碼實(shí)現(xiàn)此目的：window.onload = function() {    'use strict';    document.body.innerHTML = document.body.innerHTML.replace("Headline_01","Nice Headline 01");    document.body.innerHTML = document.body.innerHTML.replace("Headline_02","Nice Headline 02");    document.body.innerHTML = document.body.innerHTML.replace("Headline_03","Nice Headline 03");}這就是我所擁有的：<table>  <thead>    <tr>      <th class="myClass1">Current unique Headline for myClass1</th>    </tr>    <tr>      <th class="myClass2">Current unique Headline for myClass2</th>    </tr>   ....  </thead>這就是我需要的：<table>  <thead>    <tr>      <th class="myClass1">New unique Headline for myClass1</th>    </tr>    <tr>      <th class="myClass2">New unique Headline for myClass2</th>    </tr>    .....  </thead>我必須更改 20 多個(gè)項(xiàng)目，并且總是重復(fù)相同的代碼對(duì)我來(lái)說(shuō)似乎是錯(cuò)誤的，我認(rèn)為這也會(huì)導(dǎo)致性能不佳。我應(yīng)該如何改進(jìn)我的代碼？感謝您的提示！