javascript测验，应显示适当的消息并提交按钮问题

Question

我的任务包括为测验编写 JavaScript 代码。每一段代码都很好，但主要问题是我应该在测验结束时显示另一条消息，说明如果我答对了所有问题。应显示一条祝贺消息。 (例如，恭喜您答对了 3 个问题中的 3 个问题。)此外，如果当前问题尚未得到解答，我们将无法进入下一页。应禁用提交按钮。我应该使用警报框吗？？

var pos = 0, test, test_status, question, choice, choices, chA, chB, chC, correct = 0;
var questions = [
    [ "What is 10 + 4?", "12", "14", "16", "B" ],
	[ "What is 20 - 9?", "7", "13", "11", "C" ],
	[ "What is 7 x 3?", "21", "24", "25", "A" ],
	[ "What is 8 / 2?", "10", "2", "4", "C" ]
];
function _(x){
	return document.getElementById(x);
}
function renderQuestion(){
	test = _("test");
	if(pos >= questions.length){
		test.innerHTML = "<h2>You got "+correct+" of "+questions.length+" questions correct</h2>";
		_("test_status").innerHTML = "Test Completed";
		pos = 0;
		correct = 0;
		return false;
	}
	_("test_status").innerHTML = "Question "+(pos+1)+" of "+questions.length;
	question = questions[pos][0];
	chA = questions[pos][1];
	chB = questions[pos][2];
	chC = questions[pos][3];
	test.innerHTML = "<h3>"+question+"</h3>";
	test.innerHTML += "<input type='radio' name='choices' value='A'> "+chA+"<br>";
	test.innerHTML += "<input type='radio' name='choices' value='B'> "+chB+"<br>";
	test.innerHTML += "<input type='radio' name='choices' value='C'> "+chC+"<br><br>";
	test.innerHTML += "<button onclick='checkAnswer()'>Submit Answer</button>";
}
function checkAnswer(){
	choices = document.getElementsByName("choices");
	for(var i=0; i<choices.length; i++){
		if(choices[i].checked){
			choice = choices[i].value;
		}
	}
	if(choice == questions[pos][4]){
		correct++;
	}
	pos++;
	renderQuestion();
}
window.addEventListener("load", renderQuestion, false);

<h2 id="test_status"></h2>
<div id="test"></div>

var pos = 0, test, test_status, question, choice, choices, chA, chB, chC, correct = 0;
var questions = [
    [ "What is 10 + 4?", "12", "14", "16", "B" ],
	[ "What is 20 - 9?", "7", "13", "11", "C" ],
	[ "What is 7 x 3?", "21", "24", "25", "A" ],
	[ "What is 8 / 2?", "10", "2", "4", "C" ]
];
function _(x){
	return document.getElementById(x);
}
function renderQuestion(){
	test = _("test");
	if(pos >= questions.length){
		test.innerHTML = "<h2>You got "+correct+" of "+questions.length+" questions correct</h2>";
		_("test_status").innerHTML = "Test Completed";
		pos = 0;
		correct = 0;
		return false;
	}
	_("test_status").innerHTML = "Question "+(pos+1)+" of "+questions.length;
	question = questions[pos][0];
	chA = questions[pos][1];
	chB = questions[pos][2];
	chC = questions[pos][3];
	test.innerHTML = "<h3>"+question+"</h3>";
	test.innerHTML += "<input type='radio' name='choices' value='A'> "+chA+"<br>";
	test.innerHTML += "<input type='radio' name='choices' value='B'> "+chB+"<br>";
	test.innerHTML += "<input type='radio' name='choices' value='C'> "+chC+"<br><br>";
	test.innerHTML += "<button onclick='checkAnswer()'>Submit Answer</button>";
}
function checkAnswer(){
	choices = document.getElementsByName("choices");
	for(var i=0; i<choices.length; i++){
		if(choices[i].checked){
			choice = choices[i].value;
		}
	}
	if(choice == questions[pos][4]){
		correct++;
	}
	pos++;
	renderQuestion();
}
window.addEventListener("load", renderQuestion, false);

<h2 id="test_status"></h2>
<div id="test"></div>

Answer 1

只需更改此行:

test.innerHTML = "<h2>You got "+correct+" of "+questions.length+" questions correct</h2>";

对于这个:

test.innerHTML = (correct == questions.length ? "CONGRATULATIONS!!! " : "") + "<h2>You got "+correct+" of "+questions.length+" questions correct</h2>";