Image min height and width detection

image-dimensions.js

/**
 * Compares the images natural height and width with a provided
 * minimum height and width to check against. Fires callback if
 * valid
 *
 * @param $img jQuery Object
 * @param minH integer
 * @param minW integer
 * @param fn function
 */
imageZoomDetection: function($img, minH, minW, fn) {
	if (!$img.attr('href')) return;
	var _img = new Image();
	_img.onload = function() {
		var width = this.naturalWidth ? this.naturalWidth : this.width,
			height = this.naturalHeight ? this.naturalHeight : this.height;

		if (height > minH && width > minW) {
			fn();
		}
	};
	_img.src = $img.attr('href');
}