[tsigel]

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.js"></script>
<a href='#'>кнопка</a>
<div class='pic' style='background-color: red; display: none'>Картинка</div>
<script>
$(function() {
  $('a').click(function() {
    $('.pic').fadeToggle('slow');
  });
});
</script>