Untitled

<!DOCTYPE html>
<html lang="hu">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <script src="jquery-3.4.1.min.js"></script>
    <script src="validate.js"></script>
    <title>Űrlap ellenőrzés</title>
</head>

<body>
    <form action="" method="post">
        <input type="text" placeholder="felhasznalonev">
        <span id="userError"></span>
        <p>Válasszon programnyelvet</p>
        <span>C#</span> <input type="checkbox" value="c#">
        <br>
        <span>Java</span> <input type="checkbox" value="java">
        <br>
        <span>PhP</span> <input type="checkbox" value="php">
        <br>
        <p>Ismeri e az OOP-t?</p>
        <span>Igen</span><input type="radio" name="ismer" value="1">
        <br>
        <span>Nem</span> <input type="radio" name="ismer" value="0">
        <br>
        <br>
        <input type="submit" disabled value="Küldés">
    </form>
</body>

</html>