Dynamic ad container resizing

ad.html

<img id="ad" src="http://aka-cdn-ns.adtechus.com/images/5205_gamezone_source_728x90_r1.jpg" alt="Adtech Ad" border="0"/>
<script type="text/javascript">
	(function(){
		'use strict';
		var container = window.parent.document.getElementById('focus-enclose'),
		ad = document.getElementById('ad');
		if (ad&&container)
			container.style.height = ad.offsetHeight+'px';
	})();
</script>