Delay

HTML

<div id='notifications'>
    <div id='test'>Cliquez ici pour fermer</div>
</div>

CSS

#notifications { 
    width: 100px;
    height: 890px;
    background: #ffb;
    padding: 10px;
    border: 2px solid #999;
}

JavaScript

$('#test').click(function() {
    $('#notifications').fadeOut('slow', function() {});
});