iframe - DoubleClick For Publishers (DFP) : Serving expandable ads using asynchronous GPT -

i'm using asynchronous gpt serve expandable ad, creative getting cut off because seems asynchronous tags not friendly iframes.

i used dom function escape iframe parent, think can't because creative rendering before rendering of page.

this sample of tags

<script type='text/javascript' src='http://www.googletagservices.com/tag/js/gpt.js'>     googletag.pubads().definepassback('6917646/h24info/h24info_atf_home_728x90', [[728,90]]).setclickurl('[insert_click_counter_here]').display();      googletag.pubads().enablesinglerequest();      googletag.pubads().addeventlistener('slotrenderended', function(event) {          var sas = document.getelementbyid("sas_format_33008");          var gpt = document.getelementbyid("gpt_unit_6917646/h24info/h24info_atf_home_728x90_1_ad_container");          gpt.style.position = "absolute";         gpt.style.zindex = "100";          sas.style.height = "90px";     });     googletag.enableservices(); </script> 

is there can me please ?

another option use post messages. need put event listener in main site. this:

    <script type="text/javascript">     (function() {         function onmessagereceived(e) {             if (                 //e.origin !== 'http://tpc.googlesyndication.com' ||                 typeof e.data !== 'object' ||                 typeof e.data.id !== 'string' ||                 e.data.cmd !== 'setstyle' ||                 typeof e.data.params !== 'object'             ) {                 return;             }              var frame = document.getelementbyid(e.data.id);              if (frame === null) {                 return;             }              object.keys(e.data.params).foreach(function(param) {                 frame.style[param] = e.data.params[param];             });         }          if (window.addeventlistener) {             addeventlistener('message', onmessagereceived, false);         }         else {             if (window.attachevent) {                 attachevent('onmessage', onmessagereceived);             }             else {                 window.onmessage = onmessagereceived;             }         }     })(); </script> 

then in creative code, have call event listener resize elements need expand. example:

<script> (function(){     if (window.top.postmessage) {         window.top.postmessage({             cmd: 'setstyle',             id: 'div-of-the-banner',             params: {                 display: 'block',                 height: '600px',                 width: '300px'             }         }, '*');     } })(); </script> 

you may need call resize script several times if more 1 element fixing size of creative.