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Load more items in datalist when scroll down ?

Hi all ,

I am making a scroll feature in my website that loads more items into the datalist when i scroll down (like Facebook)

Code :

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs" Inherits="temp_Test" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <style>
        .AlbumShadow
        {
            float: left;
            margin-top: 8px;
            margin-left: 20px;
            background: #aaa;
        }
        .AlbumShadow img
        {
            margin: -4px 4px 4px -4px;
            display: block;
            position: relative;
            padding: 4px;
            border-left: 1px solid #ccc;
            border-top: 1px solid #ccc;
            border-right: 1px solid #888;
            border-bottom: 1px solid #888;
            background: #fcfcfc;
        }
    </style>
    <script src="../jscripts/jquery-1.7.2.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(document).ready(function () {

            function lastPostFunc() {
                $('#divPostsLoader').html('<img src="images/loading.gif">');
                //send a query to server side to present new content
                $.ajax({
                    type: "POST",
                    url: "test.aspx/ItemsGet",
                    data: "{}",
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    success: function (data) {

                        if (data != "") {

                            document.getElementById('divLoadData').innerHTML = document.getElementById('divLoadData').innerHTML + data.d;

                            $('.divLoadData:last').after(data.d);
                        }
                        $('#divPostsLoader').empty();
                    }
                })
            };
            //When scroll down, the scroller is at the bottom with the function below and fire the lastPostFunc function
            $(window).scroll(function () {
                if ($(window).scrollTop() == $(document).height() - $(window).height()) {
                    lastPostFunc();
                }
            });

        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
        <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
        <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
        <div id="divPostsLoader">
        </div>
        <div id="divLoadData">
        </div>
    </div>
    </form>
</body>
</html>


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class temp_Test : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    [System.Web.Services.WebMethod]
    public static string ItemsGet()
    {
        return "<div class='AlbumShadow'><img src='../NewImages/ME0224f.jpg' width='100px' height='100px'/></div>";
    }
}

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