hujak_hujak,
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<style type="text/css">
#slider{
position: relative;
width: 100%;
height: 400px;
overflow: hidden;
}
.img{
position: absolute;
width: 100%;
height: 400px;
left: 100%;
}
.img:nth-of-type(1){
background-color: green;
}
.img:nth-of-type(2){
background-color: grey;
}
.img:nth-of-type(3){
background-color: darkcyan;
}
.img:nth-of-type(4){
background-color: darkkhaki;
}
.active{
left:0;
}
#butRight,#butLeft{
z-index: 200;
position: absolute;
top:200px;
width: 40px;
height: 40px;
background-color: yellow;
}
#butRight{
right: 5px;
}
#butLeft{
left: 5px;
}
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script>
$(window).load(function() {
var item = $(".img"),
i = 0,
len = item.length;
$("#butRight, #butLeft").on("click", function(event) {
event.preventDefault();
i += this.id == "butRight" ? 1 : -1;
i == -1 && (i = len - 1);
i == len && (i = 0);
item.removeClass("active").eq(i).addClass("active")
})
});
</script>
</head>
<body>
<body>
<div id="slider">
<a href="" id="butRight"></a>
<a href="" id="butLeft"></a>
<div class="img active"></div>
<div class="img"></div>
<div class="img"></div>
<div class="img"></div>
</div>
</body>
</body>
</html>