$(function() {
   
    setInterval("slideShow('#ss_before')",5000)
    setInterval("slideShow('#ss_progress')",5000);
    setInterval("slideShow('#ss_after')",5000);    
    
});

function slideShow(div)
{
    var $active = $(div+' li.active');
    if($active.size() == 0) $active = $(div+' li:last');
    
    var $next = $active.next().size() ? $active.next() : $(div+' li:first');
    
    $active.addClass('last-active');
    
    $next.css({opacity: 0.0})
	.addClass('active')
	.animate({opacity: 1.0}, 1000, function() {
	    $active.removeClass('active last-active');
	});
}