var max = 3;
var nrImages = 1;
function makeImages() {
    this[0] = "imagens/logo/torque.jpg";
    this.length = nrImages;
}
function makeLinks() {
    this[0] = "http://www.torque-sul.com.br";
    this.length = nrImages;
}
function makeAlt() {
    this[0] = "Torque";
}
var vetImages = new makeImages();
var vetLinks = new makeLinks();
var vetAlt = new makeAlt();
var x = Math.round(Math.random()*max);
var y = max / nrImages;
for(var cont = 1;cont*y<= max;cont++) {
if (x <= (cont*y)) {
document.write("<a href="+vetLinks[cont-1]+" rel='nofollow' target='_blank'><img alt="+vetAlt[cont-1]+" src="+vetImages[cont-1]+" border=0></a>");
break;
}
}