Possy

jQuery plugin for separate background-position (background-position-x/background-position-y) animations/manipulations. All jQuery.css and jQuery.animate features are supported

Usage

$('el').css('background-position-x', 100);
$('el').css({ backgroundPositionX: 100 });
$('el').animate({ backgroundPositionX: 100 })
$('el').css({ backgroundPositionX: 100 }).animate({ backgroundPositionX: '-=100' })