HTML 5 Code

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Password generator</title>
    <script type="text/javascript" src="main.js"></script>
    <link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
    <header>
        <h1>Password generator</h1>
        <h2>You can write the width of the password and wait.</h2>
    </header>
    <form onsubmit="return getValue('limit')">
    <input type="text" onfocus="this.value=''" value="Enter the number.">
    </form>
</body>
</html>