window.setTimeout('fade0()' , 3000);

function fade0(step) {
var img = document.getElementById("j1b");
img.style.zIndex = 40;
var img = document.getElementById("j2b");
img.style.zIndex = 41;
var img = document.getElementById("j3b");
img.style.zIndex = 42;

window.setTimeout('fade1()' , 3000);
}

function fade1(step) {
var img = document.getElementById("j1c");
img.style.zIndex = 45;
var img = document.getElementById("j2c");
img.style.zIndex = 46;
var img = document.getElementById("j3c");
img.style.zIndex = 47;

window.setTimeout('xxx()' , 3000);
}

function xxx(step) {

var img = document.getElementById("j1b");
img.style.zIndex = 20;
var img = document.getElementById("j2b");
img.style.zIndex = 21;
var img = document.getElementById("j3b");
img.style.zIndex = 22;

var img = document.getElementById("j1c");
img.style.zIndex = 15;
var img = document.getElementById("j2c");
img.style.zIndex = 16;
var img = document.getElementById("j3c");
img.style.zIndex = 17;

window.setTimeout('fade0()' , 3000);
}