$(function(){
    var adsH = $(".ads").parent().children("h2");
    var adsHSpan = adsH.children(".hint");
    $(".box2 .ads").hide();
    adsH.click(function(){
      if( $(".ads").css("display")=="none" ){
        $(".ads").animate({height: "show"}, 400);adsHSpan.css({backgroundPosition: "0 -20px"});
      }else{ $(".ads").animate({height: "hide"}, 400);adsHSpan.css({backgroundPosition: "0 0"});}
    });
  });