jQuery.fn.slideshow = function() {
	var current = 0;
	var start = 0;
	var timer = '';
	var lista = document.getElementById("promocje_li").getElementsByTagName("li");
	var t_max = lista.length;
	var change = function () {
		if(start==0)
		{
			start++;
		}
		else
		{
			current++;
			if (current >= t_max)
			{
				current=0;
			}

			$("#category_box_layer").fadeOut('slow',function(){
				document.getElementById("category_box_layer").innerHTML = lista[current].innerHTML;
			});
			$("#category_box_layer").fadeIn('slow');
		
			/*$("#category_box_layer")
			.fadeIn('slow')
			.animate({opacity: 1.0}, 5900)
			.fadeOut('slow', function() {
				document.getElementById("category_box_layer").innerHTML = lista[current].innerHTML;
			});*/
		}
		timer = setTimeout(change, 7000);
	}
	change();
	return this;
};