Ajuda JQuery

Estou com um código em jquery para a paginação de um site, ele está carregando a página, porém, não volta ao topo. Muda a página mas fica no final onde estão localizados os botões de paginação.

O código é esse:

$(document).ready(function(){ //how much items per page to show var show_per_page = 8; //getting the amount of elements inside content div var number_of_items = $('#content').children().size(); //calculate the number of pages we are going to have var number_of_pages = Math.ceil(number_of_items/show_per_page); //set the value of our hidden input fields $('#current_page').val(0); $('#show_per_page').val(show_per_page); //now when we got all we need for the navigation let's make it ' /* what are we going to have in the navigation? - link to previous page - links to specific pages - link to next page */ var navigation_html = 'Prev'; var current_link = 0; while(number_of_pages > current_link){ navigation_html += ''+ (current_link + 1) +''; current_link++; } navigation_html += 'Next'; $('#page_navigation').html(navigation_html); //add active_page class to the first page link $('#page_navigation .page_link:first').addClass('active_page'); //hide all the elements inside content div $('#content').children().css('display', 'none'); //and show the first n (show_per_page) elements $('#content').children().slice(0, show_per_page).css('display', 'block'); }); function previous(){ new_page = parseInt($('#current_page').val()) - 1; //if there is an item before the current active link run the function if($('.active_page').prev('.page_link').length==true){ go_to_page(new_page); } } function next(){ new_page = parseInt($('#current_page').val()) + 1; //if there is an item after the current active link run the function if($('.active_page').next('.page_link').length==true){ go_to_page(new_page); } } function go_to_page(page_num){ //get the number of items shown per page var show_per_page = parseInt($('#show_per_page').val()); //get the element number where to start the slice from start_from = page_num * show_per_page; //get the element number where to end the slice end_on = start_from + show_per_page; //hide all children elements of content div, get specific items and show them $('#content').children().css('display', 'none').slice(start_from, end_on).css('display', 'block'); /*get the page link that has longdesc attribute of the current page and add active_page class to it and remove that class from previously active page link*/ $('.page_link[longdesc=' + page_num +']').addClass('active_page').siblings('.active_page').removeClass('active_page'); //update the current page input field $('#current_page').val(page_num); }