Resizeable Background Image

[4uk4a]

Currently using a 'responsive' template for Opencart.All is working but having problem with homepage slider on mobile device.Working fine on most but breaks on ipad (horizontal/landscape view)here the link ( http://susannichole.com/ )I need to fix this with css or with js codeIf any one can give me css code to put it in the style sheet file it will be fine thanks