$(window).load(checkAspects);
$(window).resize(checkAspects);

function checkAspects() {
	$(".hover_img img").each(function () {
		var $image = $(this);
		var $imageContainer = $(this).parent();
		var imageHeight = $image.height();
		var imageWidth = $image.width();
		var containerHeight = $imageContainer.height();
		var containerWidth = $imageContainer.width();
	
		if (imageHeight/imageWidth > containerHeight/containerWidth) {
			$image.addClass("tall");
		} else {
			$image.removeClass("tall");
		}
	});
}