var max      = 10;
  var nrImages = 2;
  function makeImages() {
    this[0]     = "banners/Index_Banner_FAP_AgoSet2010.jpg";
    this[1]     = "banners/Index_Banner_FAP_AgoSet2010.jpg";	
	this.length = nrImages;
  }
  function makeLinks() {
    this[0]   = "http://www.companyweb.com.br/treinamento/index2.cfm?id_categoria=1&id_curso=139&id_detalhe=1";
    this[1]   = "http://www.companyweb.com.br/treinamento/index2.cfm?id_categoria=1&id_curso=139&id_detalhe=1"; 
     
    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]+" ><img  src="+vetImages[cont-1]+" border=0></a>");
      break;
    }
  }