Dynamic iframe size - fits the size of the html element (container)
<script>
$(document).ready(function() {
$('.widget-html iframe').css('width', function(i, v) {
return $(this).closest('.widget-html').css('width');
});
$('.widget-html iframe').css('height', function(i, v) {
return $(this).closest('.widget-html').css('height');
});
})
</script>