我正在尝试将“takenappt”数组中找到的表格单元格的背景颜色更改为黑色，而不是默认的白色。这是我到目前为止所拥有的：<!DOCTYPE html><html><head><title>Test</title></head><body><table id="table"></table><script type="text/javascript"> //this code prints out the table. let table = document.getElementById("table"); for (a = 0; a < 3; a++) { let row = table.insertRow(a); for (b = 0; b < 3; b++) { row.insertCell(b); table.rows[a].cells[b].innerHTML = a; table.rows[a].cells[b].id = a + ":" + b; } } var takenappt = ["0:1", "1:2"]; var repeat = takenappt.length; //this code is supposed to go through my takenappt array and change the background color of certain table cells. for (i = 0; i < repeat; i++) { var appt = document.getElementById(takenappt[i]); appt.style.backgroundColor = black; }</script></body></html>我试图用 row:column 键存储每个表单元格，然后将某些键放入 takeappt 数组中，以便从数组中检索它们并使用它来更改该表单元格的颜色。任何帮助将不胜感激。
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