$(function() {	
	$("ul.portfolio li ul.screens").each( function() {
		$(this).children("li").hide().eq(0).show();
	});
	
	$("ul.screens-nav li.next").click( function() {
		var screens = $(this).parent().parent().children("ul.screens");
		
		if (screens.children("li:visible").next("li").length > 0)
			screens.children("li:visible").fadeOut("slow").next("li").fadeIn("slow");
		else {
			screens.children("li:visible").fadeOut("slow");
			screens.children("li").eq(0).fadeIn("slow");
		}

		return false;
	});
	
	$("ul.screens-nav li.prev").click( function() {
		var screens = $(this).parent().parent().children("ul.screens");

		if (screens.children("li:visible").prev("li").length > 0)
			screens.children("li:visible").fadeOut("slow").prev("li").fadeIn("slow");
		else {
			screens.children("li:visible").fadeOut("slow");
			
			screens.children("li").eq(screens.children("li").length-1).fadeIn("slow");
		}

		return false;
	});
});