<style type="text/css">
    iframe{
        border: 0;
        border-top-right-radius: 5px;
        border-top-left-radius: 5px;
    }
</style>

<script type="text/javascript">
  function resizeIframe(obj){
     obj.style.height = 0;
     obj.style.height = obj.contentWindow.document.body.scrollHeight + 'px';
  }
</script>

<iframe src="[RD]PBB/libs/code/{content}" width="100%" onload="resizeIframe(this)"></iframe>