var max = 5;
var nrImages = 5;
function makeImages() {
this[0] = "http://i40.tinypic.com/2dccu9l.gif";
this[1] = "http://i40.tinypic.com/24pge9v.gif";
this[2] = "http://i44.tinypic.com/2h70u3c.gif";
this[3] = "http://i43.tinypic.com/wvaahf.gif";
this[4] = "http://i40.tinypic.com/2dccu9l.gif";


this.length = nrImages;
}

function makeLinks() {
this[0] = "http://compare.buscape.com.br/procura?id=12&raiz=1&kw=caneta+espia&site_origem=5406873";
this[1] = "http://compare.buscape.com.br/sony-playstation-3-80gb.html?pos=1&site_origem=5406873";
this[2] = "http://compare.buscape.com.br/categoria?id=6424&lkout=1&kw=positivo+mobile&site_origem=5406873";
this[3] = "http://compare.buscape.com.br/categoria?id=6424&lkout=1&kw=dell&site_origem=5406873";
this[4] = "http://compare.buscape.com.br/procura?id=12&raiz=1&kw=caneta+espia&site_origem=5406873";



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;
}
}