$(document).ready(function() {
	
	var bg = 0;
	
	$("#scroll_right").click(function() {
		bg -= 400;
		$("#scroller").animate({
			backgroundPosition: bg+"px 0"
		}, 1000);
	});
	
	$("#scroll_left").click(function() {
		bg += 400;
		$("#scroller").animate({
			backgroundPosition: bg+"px 0"
		}, 1000);
	});
	
});