var bg = new Array();bg[bg.length]='http://img85.imageshack.us/img85/6818/essaiban1.png';bg[bg.length]='http://img293.imageshack.us/img293/2620/banniere3y.png';bg[bg.length]='http://img686.imageshack.us/img686/9458/banniere2d.png';document.body.style.backgroundImage='url('+bg[Math.floor(Math.random()*bg.length)]+')';