$(function(){
	scaleToFit();
	$(window).resize(scaleToFit);
});

function scaleToFit()
{
	w = $(document).width();
	h = 860 * (w/1280);
	topOffset = $(document).height() - h;
	
	$("#background img").attr({width: w, height: h}).css({top: topOffset});
}