$(document).ready(function(){
	resize();
});
$(window).resize(function(){
	resize();
});

function resize(){
	$('#background img')
		.width($(window).width())
		.height($(window).width() * 0.66);

	if($('#background img').height() <= $(window).height()){
		$('#background img')
			.height($(window).height())
			.width($(window).height() * 1.5);
	}
}