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  Jan 3 2015 10:32PM     John
  0 Comments    1204 Views  
Here you can see the simple code for Ajax in JavaScript. Before using Ajax, you need to add the AjaxControlToolKit.ddl to your bin folder.
You can download from the below link, Click Here
HTML

<html>
<body>
    <form id="form1" runat="server">
    <div>
        <input type="button" value="Save" class="sub" onclick="ajaxCallMethod()" />
    </div>
    </form>
</body>

CSS

<style type="text/css">
        .btn
        {
            line-height: 2.0;
            border-radius: 4px;
            border: none;
            font-size: 14px;
            cursor: pointer;
            color: #fff;
            background-color: #00a9da;
            border-color: #0094bf;
        }

</style>

Java Script

<script language="javascript" type="text/javascript">
        var xmlHttp;
        function ajaxCallMethod() {
            try {
                xmlHttp = GetXmlHttpObject();
                if (xmlHttp == null) {
                    alert("Your browser does not support AJAX!");
                    return;
                }
                var url = 'AjaxCall-Javascript.aspx?Pagename=js';
                xmlHttp.onreadystatechange = function () {
                    if (xmlHttp.readyState == 4) {
                        if (xmlHttp.status == 200) {
                            alert(xmlHttp.responseText);
                        }
                        if (xmlHttp.readyState == 4) {
                            // LoadingPage();
                        }
                    }
                }
                xmlHttp.open("POST", url, true);
                xmlHttp.send(null);
                if (xmlHttp.readyState == 1) {
                    //alert('Loading');
                }
            } catch (e) {
                alert(e.Message);
            }
        }
    </script>

You can also pass parameter to the page using Query String “Pagename” , shown in above method.

function GetXmlHttpObject() {
            var xmlHttp = null;
            try {
                xmlHttp = new XMLHttpRequest();
            }
            catch (e) {
                try {
                    xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
                }
                catch (e) {
                    xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
                }
            }
            return xmlHttp;
        }

C#


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class AjaxCall_Javascript : System.Web.UI.Page
{
    string returnvalue = string.Empty;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            if ((Request.QueryString["Pagename"] == "js"))
            {
                returnvalue = "Server Responded - The Developer Tips";
                Response.ContentType = "text/XML";
                Response.Write(returnvalue);
                Response.End();
            }
        }
    }
}

Demo
You can see live Ajax call demo from clicking the below Submit button and getting response from server without page reload.

Hi, This is John.I hope this page will helps you to create simple page with JavaScript Ajax.Thanks.
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