function resizeShoulders() {
	var shoulderWidth = Math.ceil(($(window).width() - $("#container").width()) / 2);
	var cssProperties = {
		"width": shoulderWidth + "px",
		"height": $(document).height() + "px"
	};
	$("#left-shoulder").css(cssProperties);
	$("#right-shoulder").css(cssProperties);
}

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