For example: tried to hide the wiki-logo by hiding the class ("#central-featured-logo" which is associated with the wiki logo) but didn't work
<script>
$(document).ready(function () {
try {
if(window.name != "")
{
document.getElementById("#central-featured-logo").style.display ='none';
}
}
catch (e) { alert("Error: " + e); }
});
</script>
<iframe width="100%" height="400" src="https://www.wikipedia.org/"></iframe>