var bannerImg1 = new Array();
var bannerImg2 = new Array();
var bannerImg3 = new Array();
var bannerImg4 = new Array();

bannerImg1[0]="images/j1_1.png";
bannerImg1[1]="images/j1_2.png";
bannerImg1[2]="images/j1_3.png";
bannerImg1[3]="images/j1_4.png";
bannerImg1[4]="images/j1_5.jpg";

bannerImg2[0]="images/j2_1.png";
bannerImg2[1]="images/j2_2.png";
bannerImg2[2]="images/j2_3.png";
bannerImg2[3]="images/j2_4.png";
bannerImg2[4]="images/j2_5.jpg";
          
bannerImg3[0]="images/j3_1.png";
bannerImg3[1]="images/j3_2.png";
bannerImg3[2]="images/j3_3.png";
bannerImg3[3]="images/j3_4.png";
bannerImg3[4]="images/j3_5.jpg";
          
bannerImg4[0]="images/j4_5.jpg";
bannerImg4[1]="images/j4_2.png";
bannerImg4[2]="images/j4_3.png";
bannerImg4[3]="images/j4_1.png";

var i = -1;
var j = -1;
//var totalBan = bannerImg.length;
var totalBan = 5;
var totalBan2 = 4;

function cycleBan() {
  i++;
  j++;
  if (i == totalBan) {i = 0;}
  if (j == totalBan2) {j = 0;}
  document.banner1.src=bannerImg1[i];
  document.banner2.src=bannerImg2[i];
  document.banner3.src=bannerImg3[i];
  document.banner4.src=bannerImg4[j];
  setTimeout("cycleBan()", 4000);
}

window.onload=cycleBan;