Hide external Iframe Criteo async tag when passback empty

Question

Hope someone can help us. We need to hide an external iframe without passback that the async Criteo tag creates, (resulting in a white empty space) when no banner is loaded. Any idea?

This is the tag:

    <div id="one" margin="0px">
    <script>
    var cto_zoneid_desktop = "xxxxxx";
    var cto_zoneid_mobile = "xxxxxx";
     var cto_lim_w = 700,cto_lim_h = 200,cto_zoneid_selected = cto_zoneid_desktop;
    if( window.screen.width<window.cto_lim_w || window.screen.height<window.cto_lim_h){cto_zoneid_selected = cto_zoneid_mobile;}
    var crt_curl = '#CLICK_URL_UNESC#';
    (function(w,d,s,c,z,u){var f=d.getElementsByTagName(s)[0],
    j=d.createElement(s),l = '&loc=' + encodeURIComponent(w.location), r = d.referrer ? '&referer=' + encodeURIComponent(d.referrer) : '', g = u.substring(0,4) == 'http' ? '&ct0='+encodeURIComponent(u) : '', cb="&cb="+Math.floor(Math.random()*99999999999) ;j.async='true';j.src=(("https:"==location.protocol?"https:":"http:")+
    '//cas.criteo.com/delivery/ajs.php?zoneid='+z+'&containerid='+c+g+l+r+cb).substring(0,2000);f.parentNode.insertBefore(j,f);
    })(window,document,'script','one',cto_zoneid_selected,crt_curl);
    </script>
    </div>

Answer 1

I've found a solution to hide the iframe from Criteo in case of no banner. Put in the passback the following code:

    <script type="text/javascript">
    window.frameElement.style.display = "none";
    </script>

It works. Hope it may help someone.