Untitled

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <style>
 #form1 {
    display : none;
}
button {
    margin-bottom: 10px;
}
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>

<div id="signup">
    <button id="signup">Покажи, че си Българин!</button><br>
            <img src="http://icons.iconarchive.com/icons/custom-icon-design/all-country-flag/72/Bulgaria-Flag-icon.png" id="form1">
</div>

<script>
$( document ).ready( function() {
    $( "#signup" ).click( function() {
        $( "#form1" ).toggle( 'slow' );
    });
});
</script>

</body>
</html>