Quick radio button test

by VtoCorleone

HTML

<h2>Quiz</h2>

<div>
    <strong>#1: Here is a question:</strong>
</div>
&nbsp;<input type="radio" value="1" name="Q1"> here is answer 1 <br>
&nbsp;<input type="radio" value="2" name="Q1"> here is answer b <br>
&nbsp;<input type="radio" value="3" name="Q1"> 3rd option why not <br>
&nbsp;<input type="radio" value="4" name="Q1"> the last <br>

<button>Submit</button>

JavaScript

'use strict';

var sub = document.getElementsByTagName('button');
var correctAnswer = "3";

sub[0].onclick = function(){
    var q1_answers = document.getElementsByName('Q1');
    
    for (var i = 0; i < q1_answers.length; i++) {
        if (q1_answers[i].checked) {
            alert(q1_answers[i].value === correctAnswer ? 'Good Job' : 'Try Again');
            break;
        }
    }
};