var delai=3500;
var i=1;
che = "img/";

var imageD = new Array();
var cacheD = new Array();

imageD[0] = che+'bienetre.jpg';
imageD[1] = che+'bienetre2.jpg';
imageD[2] = che+'bienetre3.jpg';
imageD[3] = che+'bienetre4.jpg';


for(a = 0; a < imageD.length; a++) {
  cacheD[a] = new Image();
	cacheD[a].src = imageD[a];
}

function chgImg(){
  if (document.getElementById) o = document.getElementById('diapo');
  else if (document.images) o = document.images.diapo;
        
  if (o) {
    if (o.filters) o.filters[0].apply();
    o.src = cacheD[i].src;
    if (o.filters) o.filters[0].play();
  }        
        
  i = i+1;
  if (i == cacheD.length) i = 0;
  
  setTimeout('chgImg()',delai);
}