imageNumber = 1;

images = new Array();

for (i = 1; i <= 9; i++) {
   images[i] = new Image();
   images[i].src = "images/unisex_slogan" + i + ".jpg";
}

function nextImage() {
   document.animation.src = images[imageNumber].src;
   //document.write("Image: " + imageNumber);
   
   imageNumber++;
   if (imageNumber < 10) {
      setTimeout('nextImage()', Math.random()*500);
   }

}