<script>
imgName=new Array("filari","cantina","taverna","sentiero");
i=0;
function roll()
{
i++;
i=i==imgName.length?0:i;
imgPath="../images/"+imgName[i]+".jpg";
alert(imgPath);
document.images["cascina"].src=imgPath;
}
setInterval("roll()",3000);
</script>