Ajax call

function loadArticle(pageNumber, author_id) {
                $('div#inifiniteLoader').show('fast');

                $.ajax({
                    url: "<?php bloginfo('wpurl'); ?>/wp-admin/admin-ajax.php",
                    type: 'POST',
                    data: "action=infinite_scroll&page_no=" + pageNumber  + '&author_id='+ author_id + '&loop_file=loop',
                    success: function(html) {
                        $('div#inifiniteLoader').hide('1000');
                        //$('#container_author').isotope('insert', html);

                        $("#container_author").append(html).isotope('reloadItems').isotope({
                            itemSelector: '.item',
                            masonryHorizontal: {
                                rowHeight: 360,
                            }
                        });
                    }
                });

                return false;
            }