var delay = 15;
var image = new Array();
var lien = new Array();
var texte = new Array();

function changeImage(which) {
 clearTimeout(timerID);
 document.getElementById('du9bandeau').style.background = 'url('+image[which]+')';
 document.getElementById('du9link').href = lien[which];
 document.getElementById('legal').innerHTML = texte[which];
}

function previmg() {
 clearTimeout(timerID);
 if(curNum==0) curNum = image.length;
 curNum--;
 changeImage(curNum);
 timerID = setTimeout("previmg()", delay * 1000);
}

function nextimg() {
 curNum++;
 if(curNum==image.length) curNum = 0;
 changeImage(curNum);
 timerID = setTimeout("nextimg()", delay * 1000);
}

function launch() {
  var imagePreload = new Array();
  curLoad = 0;
  while(curLoad < image.length) {
    imagePreload[curLoad] = new Image();
    imagePreload[curLoad].src = image[curLoad];
  }
}

timerID = setTimeout("nextimg()", delay * 1000);