pankrat,
и еще так:
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
.slider{
position: relative;
width: 640px;
height: 480px;
}
.slider *{
display: block;
position: absolute;
left: 0;
top: 0;
}
.slider a {
z-index: 1;
}
.slider a:first-child {
z-index: 10;
}
.slider a:nth-child(2) {
z-index: 5;
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
$(function () {
setInterval(function () {
$('.slider a:first-child').fadeTo(500, 0, function() {
$(this).appendTo('.slider').css({opacity:1});
})
}, 3000);
});
</script>
</head>
<body>
<div class="slider">
<a href="#"><img src="http://www.fonstola.ru/pic/201303/640x480/fonstola.ru-91576.jpg" alt="Img 1" /></a>
<a href="#"><img src="http://files.vividscreen.info/soft/368b834b2d1a426882a89edab24232e9/Autumn-Forest-640x480.jpg" alt="Img 2" /></a>
<a href="#"><img src="http://www.allfons.ru/pic/201201/640x480/allfons.ru-4352.jpg" alt="Img 3" /></a>
<a href="#"><img src="http://uvdhmao.ru/upload/iblock/a6e/a6e740a7fa90f2aae6f1ac0dcd5ec5cf.jpg" alt="Img 4" /></a>
</div>
</body>
</html>