Quiz Test

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<h2 id="test_status"></h2>
<div id="test"></div>
<script>
    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  onclick='checkAnswer()'  type='radio' class='choice' name='choices' value='A'id='choA'> <label for='choA'>" + chA + "</label><br>";
        test.innerHTML += "<input  onclick='checkAnswer()'  type='radio' class='choice' name='choices' value='B'id='choB'> <label for='choB'>" + chB + "</label><br>";
        test.innerHTML += "<input  onclick='checkAnswer()'  type='radio' class='choice' name='choices' value='C'id='choC'> <label for='choC'>" + chC + "</label><br>";
        test.innerHTML += "<button  onclick='nextAnswer()' disabled='disabled' id='choiceSubmit'>Submit Answer</button>";
    }

    function checkAnswer() {
        choiceClicked = true;
        $("#choiceSubmit").removeAttr("disabled");
        $("#test label").css("background-color", "transparent");
        if ($("#test...

CSS

div#test {
            border: #000 1px solid;
            padding: 10px 40px 40px 40px;
        }