动态缩放图像以适合指定的大小宽度和高度

So after extensive research and tons of jQuery and Javascript solutions I simply could not find a way in which to dynamically scale images to a specified size both horizontally and vertically, I found tons of information on scaling to fit width wise and keep the aspect ratio, or scaling to fit height wise and keep the aspect ratio, but couldn't figure out whether the image was too tall or too short and adjust accordingly.So after extensive research and tons of jQuery