搜索框键盘抬起事件2

//搜索框键盘抬起事件
$('.menu-container').on(
  'keyup','#search_input',function(){
  //处理事件
  var lilist = $('.menu-container #bootstrapnavagation ul.nav-second-level li');
  var val = this.value;
    for (var i = 0; i < lilist.length; i++){
     // console.log($(lilist[i]).text())
      var lival =$(lilist[i]).text();
      var linum =$(lilist[i]);

      if(lival.indexOf(val) > -1 && val.trim().length > 0 ){
        linum.addClass('active');
        var litop =$($('ul.nav-second-level li.active')[0]).offset().top;
        $("#bootstrapnavagation").scrollTop(litop/2);
      }else{

linum.removeClass('active');

}

if(val.trim()=='' ){

        lilist.removeClass('active');
      }
    }
})