假分页，html jquery js分页

$(document).ready(function(){

            //每页显示的数目
            var show_per_page = 10;
            //获取content对象里面，数据的数量
            var number_of_items = $('#stockChgBillItemTableBody').children().size();
            //计算页面显示的数量
            var number_of_pages = Math.ceil(number_of_items/show_per_page);

            //隐藏域默认值
            $('#current_page').val(0);
            $('#show_per_page').val(show_per_page);

            var navigation_html = '<a class="previous_link" href="javascript:previous();">上一页</a>';
            var current_link = 0;
            while(number_of_pages > current_link){
                navigation_html += '<a class="page_link" href="javascript:go_to_page(' + current_link +')" longdesc="' + current_link +'">'+ (current_link + 1) +'</a>';
                current_link++;
            }
            navigation_html += '<a class="next_link" href="javascript:next();">下一页</a>';

            $('#page_navigation').html(navigation_html);

            //add active_page class to the first page link
            $('#page_navigation .page_link:first').addClass('active_page');

            //隐藏该对象下面的所有子元素
            $('#stockChgBillItemTableBody').children().css('display', 'none');

            //显示第n（show_per_page）元素
            $('#stockChgBillItemTableBody').children().slice(0, show_per_page).css('display','');

        });

//上一页
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);
    }

}
//下一页
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);
    }

}
//跳转某一页
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
    $('#stockChgBillItemTableBody').children().css('display', 'none').slice(start_from, end_on).css('display', '');
    $('#stockChgBillItemTableBody').children().slice(start_from,end_on).css('display','');
    /*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);
}