<!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>
    <meta http-equiv="Content-Type" content="text/html; charset=gbk" />
    <title>Getting Server side data using AJAX</title>
</head>

<script>
    function creat_Object() {
        var xmlhttp;
        if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
            try {
                xmlhttp = new XMLHttpRequest();
            }
            catch (e) {
                alert("Your browser is not supporting XMLHTTPRequest"); 
                xmlhttp = false;
            }
        }
        else {
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        return xmlhttp;
    }
    var request = creat_Object();
    function sever_interaction() {
        if (request.readyState == 1) {
            document.getElementById('aja_cnts').value = '';
            document.getElementById('aja_cnts').value = 'Loading...';
        }
        if (request.readyState == 4) {
            var answer = request.responseText;
            document.getElementById('aja_cnts').value = '';
            document.getElementById('aja_cnts').value = answer;
        }
    }
    function call_server() {
        request.open("GET", "Response.asp");
        request.onreadystatechange = sever_interaction; request.send('');
    }
</script>

<body>
    <input type="button" name="btnLoad" id="btnLoad" value="点击加载" onclick="call_server();" />
    <input type="text" style=" width:265px; height:68px;" id="aja_cnts" />
</body>
</html>

获取页面Response.asp代码：document.getElementById('aja_cnts').value

Response.asp代码示例：
<%
    Response.Write "您好！欢迎光临悠9小店！"
    Response.Write "我们的网址是：http://you9luck.taobao.com"
%>