$(function(){
	$("#sn_holder_twitter").hover(
	  function () {$(this).css("background-position","0px 0px");},
	  function () {$(this).css("background-position","-20px 0px");}
	);
	$("#sn_holder_facebook").hover(
	  function () {$(this).css("background-position","0px 0px");},
	  function () {$(this).css("background-position","-20px 0px");}
	);
	$("#sn_holder_youtube").hover(
	  function () {$(this).css("background-position","0px 1px");},
	  function () {$(this).css("background-position","-48px 1px");}
	);
});