var max = 4;
var nrImages = 4;
function makeImages() {
this[0] = "http://i49.tinypic.com/4v3doj.jpg";
this[1] = "http://i46.tinypic.com/2w7mh3b.jpg";
this[2] = "http://i46.tinypic.com/zlqn0n.jpg";
this[3] = "http://i46.tinypic.com/2ljkf9f.jpg";
;


this.length = nrImages;
}

function makeLinks() {
this[0] = "http://baixenamoleza.org/imperdivel/?d446b4";
this[1] = "http://baixenamoleza.org/imperdivel/?2ee661";
this[2] = "http://baixenamoleza.org/imperdivel/?352f81";
this[3] = "http://baixenamoleza.org/imperdivel/?aa9816";



this.length = nrImages;
}


var vetImages = new makeImages();
var vetLinks = new makeLinks();
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]+" target=_blank><img src="+vetImages[cont-1]+" border=0></a>");
break;
}
}