Questão 1938840

form.js

form.html

var f =

document.getElementById('formSignup');

var t =

document.getElementById('terms');

var th =

document.getElementById('termsHint');

var tries = 0;

function check(event) {

tries++;

if (tries > 5) {

th.innerHTML = 'Bloqueado!';

event.preventDefault();

} else if (!t.checked) {

th.innerHTML = 'Selecione!';

event.preventDefault();

}

}

f.addEventListener('submit', check, false);

<!DOCTYPE html>

<html>

<head>

<title>UFU</title>

</head>

<body>

<div id="page">

<h1>Form</h1>

<form method="post"

action="register.html"

id="formSignup">

<input type="checkbox"

id="terms" />

<label for="terms"

class="checkbox"> Marque a caixa de texto</label>

<div id="termsHint"></div>

<input type="submit"

value="Vai" />

</form>

</div>

<script src="form.js"></script>

</body>

</html>