Javascript/スライドショー

var sArray = [
	"img/aberia.jpg",
	"img/kanamemoti.jpg",
	"img/kinmokusei.jpg",
	"img/metasekoia.jpg",
	"img/yamaboushi.jpg"
];
var sImg = document.getElementById("sImg");
var sLi = document.querySelectorAll("#sUl li");
var i = 0;
var slide;
function fff(){
  for(var j=0; j sArray.length - 1){
    i = 0;
    sImg.src = sArray[i];
  }
  fff();
  sLi[i].className = "addC";
  console.log(i)
  i++;
}
sFunc();

var prev = document.getElementById("prev");
var next = document.getElementById("next");
prev.addEventListener("click", function(){
  if(i <= 0){
  	i = sArray.length;
  }
  i = i - 1;
  sImg.src = sArray[i];
  fff();
  sLi[i].className = "addC";
});
next.addEventListener("click", function(){
  i = i + 1;
  if(i >= sArray.length){
  	i = 0;
  }
  sImg.src = sArray[i];
  fff();
  sLi[i].className = "addC";
});

function ddd(n){
	fff();
	sImg.src = sArray[n];
	sLi[n].className = "addC";
	i = n;
}