img = new Array('img/rrac.png', 'img/frontier.jpg','img/frontier_attack.jpg','img/grandscenic.jpg','img/kangoo.jpg','img/logan.jpg','img/megane.jpg','img/sandero.jpg');
indice = 1;
setInterval("mudaImg()", 3000);
function mudaImg() {
if (indice == img.length - 1)
indice = 0;
else
indice++;
document.getElementById("frota").innerHTML="<img src='"+ img[indice] +"' border='0'>";
}