var max      = 10;
  var nrImages = 1;
  function makeImages() {
    this[0]     = "http://maxfilmes.com/protetor/parceria/468x60.gif";
   

    this.length = nrImages;
}
  function makeLinks() {
    this[0]     = "http://www.maxfilmes.com/";
   
    
    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;
    }
  }