Shenkuu Lunar Temple solver

Highlights the correct answer
当前为 2020-07-12 提交的版本，查看最新版本。
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// ==UserScript==
// @name         Shenkuu Lunar Temple solver
// @namespace    neopets
// @version      1.1
// @description  Highlights the correct answer
// @author       EatWoolooAsMutton
// @match        http://www.neopets.com/shenkuu/lunar/?show=puzzle
// @grant        none
// ==/UserScript==

var d = document;

var mapImage = d.querySelector("embed").getAttribute("src");
var angle = parseInt(mapImage.match(/(\d+)/g)[2]);
var angleList = [0, 12, 34, 57, 79, 102, 124, 147, 169, 192, 214, 237, 259, 282, 304, 327, 349, 361];

var answer = null;
for (var i = 0; i < angleList.length; i++) {
	if (i <= 7) {
		if (angle >= angleList[i] && angle < angleList[i + 1]) {
			console.log("2nd row, #" + (i + 1) + " from left");
			answer = i + 8;
			break;
		}
	} else if (i <= 15) {
		if (angle >= angleList[i] && angle < angleList[i + 1]) {
			console.log("1st row, #" + (i - 7) + " from left");
			answer = i - 8;
			break;
		}
	} else if (i <= 17) {
		console.log("2nd row, #1 from left");
		answer = 8;
	}
}

highlightAnswer(answer);

function highlightAnswer(num) {
	let ans = d.querySelectorAll("input[onclick='this.form.submit();']")[num];
	let cell = ans.parentElement;
	cell.style.backgroundColor = "00ffbf";
	cell.style.borderStyle = "solid";
	cell.style.borderColor = "red";
}