// change this to num of images
var numimages = 4;
// chnage to number of seconds
var seconds = 5;
// don't change below
var nextindex = 2;
var lasthomeo = --numimages;
var rollhomeo = 0;
var rate = seconds*1000;
window.addEvent('load',function(){
  //alert(rate);
  window.setTimeout('autoplay()',rate);
  $$('.rollHome').forEach(function(item,i) {
    item.setStyle('visibility','visible');
    if (i==lasthomeo) item.setStyle('opacity',100);
    else item.setStyle('opacity',0);
  });
});
function autoplay() {
  $$('.rollHome').forEach(function(item,i) {
    //alert('rollhomeo:'+rollhomeo+', i:'+i+', numimages:'+numimages);
    if (i==rollhomeo) {
      //alert('inside!');
      nextindex++;
      item.setStyle('z-index',nextindex);

      var change = new Fx.Style(item, 'opacity', {duration:rate/2});
      change.start(1);
    } else if (lasthomeo==i) {
      // 
    } else {
      item.setStyle('opacity',0);
    }
  });  
  lasthomeo++;
  rollhomeo++;
  if (lasthomeo>numimages) lasthomeo = 0;
  if (rollhomeo>numimages) rollhomeo = 0;
  //if (confirm(i+'/'+rollhomeo+' go?')) window.setTimeout('autoplay()',rate);
  window.setTimeout('autoplay()',rate);
}