function onAfter() { 
  $("#desc").html(this.title);
  $("#desc").fadeIn();
}

function onBefore() { 
  $("#desc").fadeOut();
}

$(function() { 

 $("#slider").cycle({ 
	fx: 'fade',
	timeout: 25000,
	before: onBefore,
	after: onAfter,
	pager: '#main_picture_selector'
 });

});