$(document).ready(function() {
    	$.preloadCssImages();
    
        $("ul.nav li").click(function() {

                $("ul.nav li").removeClass("active"); //Remove any "active" class
                $(this).addClass("active"); //Add "active" class to selected tab
                $(".nav_content").hide(); //Hide all tab content

                var activeTab = $(this).find("a").attr("href");//Find the href attribute value to identify the active tab + content
                $(activeTab).fadeIn("slow"); //Fade in the active ID content
                return false;
        });
		$(".pobierz").click(function() {
			$("ul.nav li").removeClass("active");
			$("ul.nav li.why").addClass("active"); //Add "active" class to selected tab
            $(".nav_content").hide(); //Hide all tab content
            
			$("#why").fadeIn("slow"); //Fade in the active ID content
            return false;
		});
		$(".testuj").click(function() {
			$("ul.nav li").removeClass("active");
			$("ul.nav li.how").addClass("active"); //Add "active" class to selected tab
            $(".nav_content").hide(); //Hide all tab content
            
			$("#how").fadeIn("slow"); //Fade in the active ID content
            return false;
		});
		$(".wygraj").click(function() {
			$("ul.nav li").removeClass("active");
			$("ul.nav li.indetail").addClass("active"); //Add "active" class to selected tab
            $(".nav_content").hide(); //Hide all tab content
            
            $("#indetail").fadeIn("slow"); //Fade in the active ID content
            return false;
		});

});