w8_view_startpage.php:

<div id='signin' class='modal-window'>
        <h2 style='text-align:center'>Sign In</h2>
        <br>
        <form method='post' action='w4_controller.php'>
            <input type='hidden' name='page' value='StartPage'></input>
            <input type='hidden' name='command' value='SignIn'></input>
            <label class='modal-label'>Username:</label>
            <input type='text' name='username' placeholder='Enter username' required></input>
            <br>
            <label class='modal-label'>Password:</label>
            <input type='password' name='password' placeholder='Enter password' required></input>
            <br>
            <br>
            <button type='submit' value='Submit'>Submit</button>
            <button type='reset' value='Reset'>Reset</button>
            <button id='cancel-signin' type='cancel' value='Cancel'>Cancel</button>
        </form>
    </div>

    <div id='join' class='modal-window'>
        <h2 style='text-align:center'>Join</h2>
        <br>
        <form method='post' action='w4_controller.php'>
            <input type='hidden' name='page' value='StartPage'></input>
            <input type='hidden' name='command' value='Join'></input>

            <label class='modal-label'>Username:</label>
            <input type='text' name='username' placeholder='Enter username' required></input>
            <br>
            <label class='modal-label'>Password:</label>
            <input type='password' name='password' placeholder='Enter password' required></input>
            <br>
            <label class='modal-label'>Email:</label>
            <input type='text' name='email' placeholder='Enter email address' required></input>
            <br>
            <br>
            <button type='submit' value='Submit'>Submit</button>
            <button type='reset' value='Reset'>Reset</button>
            <button id='cancel-join' type='cancel' value='Cancel'>Cancel</button>
        </form>
    </div>