MOBILE: Image replacement for hi-res devices

gistfile1

//Image replacement for hi-res devices
function highdpi_init() {
	var hiRes = window.devicePixelRatio > 1 ? true : false;
	if (hiRes) {
		var els = jQuery(".replace-2x").get();
		for(var i = 0; i < els.length; i++) {
			var src = els[i].src
			src = src.replace(".png", "@2x.png");
			src = src.replace(".jpg", "@2x.jpg");
			src = src.replace(".gif", "@2x.gif");
			els[i].src = src;
		}
	}
}