function setOpacity(level) {
  document.getElementById("image1").style.opacity = level;
  document.getElementById("image1").style.MozOpacity = level;
  document.getElementById("image1").style.KhtmlOpacity = level;
  document.getElementById("image1").style.filter = "alpha(opacity=" + (level * 100) + ");";
}

var duration = 2000;  /* 1000 millisecond fade = 1 sec */
var steps = 50;       /* number of opacity intervals   */
var delay = 3000;     /* 5 sec delay before fading out */
var displayI = 1;

function fadeIn(){
  for (i = 0; i <= 1; i += (1 / steps)) {
    setTimeout("setOpacity(" + i + ")", i * duration);
  }
	document.getElementById("image1").src=picA[displayI-1];
  setTimeout("fadeOut()", delay);
}

function fadeOut() {
  for (i = 0; i <= 1; i += (1 / steps)) {
    setTimeout("setOpacity(" + (1 - i) + ")", i * duration);
  }
	displayI = displayI+1;
		if (displayI>picA.length) {
			displayI=1; }
	document.getElementById("image2").src=picA[displayI-1];
  setTimeout("fadeIn()", delay);
}

function go() {
  setTimeout("fadeOut()", delay);
}