var nombre = 4;
 var temps = new Date()
 var seconde = temps.getSeconds()
 var banniere = seconde % nombre;
 banniere +=1;
 if (banniere==5) {
 url="http://53minutes.fr";
 alt="http://53minutes.fr";
 banner="./image/pubs/pub_53.jpg";
 width="217";
 height="118";
 }
 if (banniere==1) {
 url="http://histoiresenfant.fr";
 alt="http://histoiresenfant.fr";
 banner="./image/pubs/pub_hde.jpg";
 width="217";
 height="118";
 }
 if (banniere==2) {
 url="http://53minutes.fr/pasapao";
 alt="http://53minutes.fr/pasapao";
 banner="./image/pubs/pub_pasapao.jpg";
 width="217";
 height="118";
 }
  if (banniere==3) {
 url="http://maas-music.fr";
 alt="http://maas-music.fr";
 banner="./image/pubs/pub_maas.jpg";
 width="217";
 height="118";
 }
   if (banniere==4) {
 url="http://histoiresenfant.fr";
 alt="http://histoiresenfant.fr";
 banner="./image/pubs/pub_hde.jpg";
 width="217";
 height="118";
 }

 document.write('<a href=\"'+url+'\" target=\"_blank\">');
 document.write('<img src=\"'+banner+'\" width=')
 document.write(width+'height='+height+'');
 document.write('alt=\"'+alt+'\" border=0></a>');