$(document).ready(function(){

    $('div#oubli').hide();
    
    jQuery.fn.fadeToggle = function(speed, easing, callback) {
        return this.animate({opacity: 'toggle'}, speed, easing, callback);
    }; 
    
    $('div#footer a[href="#oubli"]').click(function () {
        $('div#oubli').fadeToggle()
    }); 

});