var max      = 10;
  var nrBanners = 2;
  function makeBanners() {
    this[0]     = "../../banners/sitesecia.swf";
    this[1]     = "../../banners/empresasvale.swf";
    this.length = nrBanners;
  }
  
  
  var vetBanners = new makeBanners();
  var x = Math.round(Math.random()*max);
  var y    = max / nrBanners;
  for(var cont = 1;cont*y <= max;cont++) {
    if (x <= (cont*y)) {
      document.write("<object classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000 codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0 width=160 height=80><param name=movie value="+vetBanners[cont-1]+" /><param name=quality value=high /> <embed src="+vetBanners[cont-1]+" quality=high pluginspage=http://www.macromedia.com/go/getflashplayer type=application/x-shockwave-flash width=160 height=80></embed></object>");
      break;
    }
  }