function offre_semaine_1(){ l=3;if(l!=-1) {for(i=0;i<=l;i++){image="image_"+i;document.getElementById(image).style.display="none";}k=(Math.round(l*Math.random()));image_activ="image_"+k;document.getElementById(image_activ).style.display="block";}}function offre_semaine(){offre_semaine_1();setTimeout("offre_semaine()",8000);}