JS: Resize javascript to the width of the container if it's smaller than iframe

resize-iframe.js

function resizeIframes($iframes) {
  $iframes.each(function() {
		var $iframe = $(this);
		var height = $iframe.height();
		var width = $iframe.width();
		var parentWidth = $iframe.parent().width();
		var newHeight = Math.ceil(parentWidth*(height/width));
		if(parentWidth <= width) {
			$iframe.attr('width', parentWidth);
			$iframe.width(parentWidth);
			$iframe.attr('height', newHeight);
			$iframe.height(newHeight);

		}
	});
}