Ajax - responseText, statusText

<%@LANGUAGE="JAVASCRIPT" CODEPAGE="65001"%>
<!--#include file="conn.asp" -->
<%
	var rec=Server.CreateObject("ADODB.Recordset"); var sqlstr=""; var hoten="";
	id=Request('id');
		sqlstr="select * from hosinh where id='"+id+"'";
		rec=conn.Execute(sqlstr);
		if (rec.EOF==true) Response.Write("Opps!!! Something's wrong, please <a href='hocsinh.asp'>go back</a>")
		else 	{
		hoten = rec('ho') + rec('ten');
		Response.Write('<table width="450" border="0"><tr><td width="130" rowspan="7" align="center" valign="top"><img src="'+rec('hinh')+'" alt="" id="hinh" /></td>
			  <td width="320">'+hoten+'</td>
			</tr>
			<tr>
			  <td>Ngày sinh: '+rec('ngaysinh')+'</td>
			</tr>
			<tr>
			  <td>Nơi sinh: '+rec('noisinh')+'</td>
			</tr>
			<tr>
			  <td>Địa chỉ: '+rec('diachi')+'</td>
			</tr>
			<tr>
			  <td>Số điện thoại: '+rec('dienthoai')+'</td>
			</tr>
			<tr>
			  <td>Phụ huynh: '+rec('phuhuynh')+'</td>
			</tr>
			<tr>
			  <td>Vị trí: ------</td>
			</tr>
		  </table>');
	conn.Close();
%>

function loadXMLDoc(url) 
{
	if (window.XMLHttpRequest) {
		req = new XMLHttpRequest();
		req.onreadystatechange = processReqChange;
		req.open("GET", url, true);
		req.send(null);	} 
	else if (window.ActiveXObject) {
		req = new ActiveXObject("Microsoft.XMLHTTP");
		if (req) {
			req.onreadystatechange = processReqChange;
			req.open("GET", url, true);
			req.send();	}
	}
}

function processReqChange() 
{
	if (req.readyState == 4)
	{
		if (req.status == 200)
		{
			//response  = req.respon***ML.documentElement;
			document.getElementById('noidung').innerHTML=reg.responseText;
		}
		else
		{
			document.getElementById('noidung').innerHTML=req.statusText;
		}
	}
}