function promotion_1(){ l=5;if(l!=-1) {for(i=0;i<=l;i++){promo="promotion_"+i;document.getElementById(promo).style.display="none";}k=(Math.round(l*Math.random()));promo_activ="promotion_"+k;document.getElementById(promo_activ).style.display="block";}}function promotion(){promotion_1();setTimeout("promotion()",8000);}