realia:favorites_add_rem

$(document).on('click','a.fav-add',function(e){
        var o=$(this);
        var id=o.attr('alt');
        if(id){
            $.ajax({
                url: estate_folder + "/js/ajax.php?action=add_to_favorites",
                data: 'id='+id,
                type: "POST",
                dataType: "json",
                success: function(json){
                    if(json.response.body=='OK'){
                        var favcount=$('#favorites_count');
                        if(favcount.length>0){
                            favcount.text(new Number($('#favorites_count').text())+1);
                        }
                        o.removeClass('fav-add').addClass('fav-rem');
                    }
                },
                error: function(xhr, ajaxOptions, thrownError){

                }
            });
        }
        e.preventDefaults();
    });

    $(document).on('click','a.fav-rem',function(e){
        var o=$(this);
        var id=o.attr('alt');
        if(id){
            $.ajax({
                url: estate_folder + "/js/ajax.php?action=remove_from_favorites",
                data: 'id='+id,
                type: "POST",
                dataType: "json",
                success: function(json){
                    if(json.response.body=='OK'){
                        var favcount=$('#favorites_count');
                        if(favcount.length>0){
                            favcount.text(new Number($('#favorites_count').text())-1);
                        }
                        o.removeClass('fav-rem').addClass('fav-add');
                    }
                },
                error: function(xhr, ajaxOptions, thrownError){

                }
            });
        }
        e.preventDefaults();
    });