html中怎么隐藏列表

var toggleFlag = false;

      function toggleHosptial(e){

          if(!toggleFlag){

              $('.arrow_icon').css({'background-image':'url(' + "../images/arrow_up.png" + ')'})

          }else{

            $('.arrow_icon').css({'background-image':'url(' + "../images/arrow_down.png" + ')'})

          }

        var sibling = e.parentNode.parentNode.children[1];

        $(sibling).toggle();

        toggleFlag = !toggleFlag;

      }