$(document).ready(function(){
  $('.page_item a:not(.current_page_item a, .current_page_parent a)')
	 .css( {backgroundPosition: "0 0"} )
	 .mouseover(function(){
	 $(this).stop().animate({backgroundPosition:"(0 -54px)"}, {duration:500})
	 })
	 .mouseout(function(){
	 $(this).stop().animate({backgroundPosition:"(0 0)"}, {duration:500})
  }) 
});