var gt_rnd = Math.floor(Math.random()*100000000);
var gt_url = 'http://target.godado.it/adjs.php?bid=1&sid=1&if=1&rnd=' + gt_rnd;
var gt_cod = '<iframe src="' + gt_url + '" width="500" height="50" frameborder="0" border="0" marginwidth="0" marginheight="0" scrolling="no"></iframe>';
document.write(gt_cod);