$(document).ready(function(){
	$("#nav a").mouseover(function(){
		var position = $(this).position();
		var pTop = position.top + 4;
		$("#nav").animate({backgroundPosition: "(0px " + pTop + "px)"}, { queue:false, duration:500 });
	});
	
	$("#nav a").mouseout(function(){
		$("#nav").animate({backgroundPosition: "(0px -9px)"}, { queue:false, duration:500 });
	});
});