var $slidePeriod = 3000 // czas prezentacji slajdu w milisekundach

function slideSwitch() {
    var $active = $('#slideshow li.active');

    if ( $active.length == 0 ) $active = $('#slideshow li:last');

    var $next =  $active.next().length ? $active.next()
        : $('#slideshow li:first');
	
	var $opacityPeriod = $slidePeriod/5;

    $active.addClass('last-active');

    $next.css({opacity: 0.0})
        .addClass('active')
        .animate({opacity: 1.0}, $opacityPeriod, function() {
            $active.removeClass('active last-active');
        });
}
$(function() {
//    $('#slideshow img').each(function(i){
//		$imgMarginTop = parseInt((480 - $(this).height())/2);
//		$(this).css('margin-top', $imgMarginTop+'px');
//	})
	$('#slideshow li:first').addClass('active');	
	setInterval("slideSwitch()", $slidePeriod );
});