Бесконечный скроллинг hostcms

var loading = false;
$(window).scroll(function(){
   if((($(window).scrollTop()+$(window).height())+250)>=$(document).height()){
      if(loading == false){
         loading = true;
         $('#loadingbar').css("display","block");
         $.get("load.php?start="+$('#loaded_max').val(), function(loaded){
            $('body').append(loaded);
            $('#loaded_max').val(parseInt($('#loaded_max').val())+50);
            $('#loadingbar').css("display","none");
            loading = false;
         });
      }
   }
});

$(document).ready(function() {
   $('#loaded_max').val(50);
});