var spriteHeight = 212;
var idOffset = 10;

function resetBGPosition() {
	$(".pie_graph").css({backgroundPosition: "0 0"});
}

$(document).ready(function() {
	$(".solutions_pie img").hover(function() {
		$(".pie_graph").css({backgroundPosition: "0 -" + ($(this).attr("id") * spriteHeight) + "px"});
	}, resetBGPosition);
	
	$(".solutions_pie li.pie_top").hover(function() {
		$(".pie_graph").css({backgroundPosition: "0 -" + (($(this).attr("id") - idOffset) * spriteHeight) + "px"});		
	}, resetBGPosition);
});