$(document).ready(function(){
	var check;
	var i;
	for(i=0;i<20;i++){
		if($(".a"+i+"").attr("id")){
		check=$(".a"+i+"").attr("id").slice(1,4); // selects id, slices out b and show # up to 4 characters
		}
	}
	
		
  var selected;
	try {
    selected=$("#b"+check).attr("id").slice(1,8);
  } catch (err) {
    selected = "";
  }
	
  var position;
	
	
	$("#sprite").css({backgroundPosition:''+selected+'px 3px'});
		
	$("#b-5,#b55,#b170,#b290,#b360,#b444,#b532,#b600").css({backgroundPosition:'0px 0px'}).mouseover(function(){
	position=$(this).attr("id").slice(1,8)/*width of your list item*/;
	$("#sprite").stop().animate({backgroundPosition:''+position+'px 3px'},{duration:300});
	});
	
	$("#b-5,#b55,#b170,#b290,#b360,#b444,#b532,#b600").css({backgroundPosition:'0px 0px'}).mouseout(function(){
	$("#sprite").stop().animate({backgroundPosition:''+selected+'px 3px'},{duration:300});
	});
	
	
	$("#b-5,#b55,#b170,#b290,#b360,#b444,#b532,#b600").css({backgroundPosition:'0px 0px'}).click(function(){
	selected=$(this).attr("id").slice(1,8);
	});
});