function lookbook() {
	var $active = $("#lookbook li.begin");
	if ( $active.length == 0 ) $active = $("#lookbook li:last");
	
	var $next = $active.next().length ? $active.next()
	: $("#lookbook li:first");
	
	$active.addClass("end");
	$next.css({opacity: 0.0})
	.addClass("begin")
	.animate({opacity: 1.0}, 2000, 
	function() {
		$active.removeClass("begin end");
		});
}

$(function() {
setInterval("lookbook()", 7000); //time between each li
});