Fondo de Tabla Aleatorio, por favor

[Cap.Buscapina]

probalo:

<script>
img=new Array();
img[0]="logos/banner1.jpg";
img[1]="logos/banner2.jpg";
img[2]="logos/banner3.jpg";
img[3]="logos/banner4.jpg";
img[4]="logos/banner5.jpg";

function fondo(){
cook=document.cookie;
eval(cook);
if (!fondo){
document.cookie="fondo=0;expires=Sat,01-Jan-2050 00:00:01 GMT";
var fondo=0;
}
fondo=(fondo==img.length-1)?0:parseInt(fondo)+1;
document.cookie="fondo="+fondo+";expires=Sat,01-Jan-2050 00:00:01 GMT";
document.getElementById('fondo').style.backgroundI mage="url("+img[fondo]+")"
}

</script>

chau