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LoginValidate.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="LoginValidate.aspx.cs" Inherits="LoginValidate" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>ÑéÖ¤Óû§ÃûÊÇ·ñ´æÔÚ</title>
<script type="text/javascript">
var xmlHttp;
function createXMLHttpRequest()
{
if(window.ActiveXObject)
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest)
{
xmlHttp = new XMLHttpRequest();
}
}
//´¦Àí·½·¨
function CheckUserName()
{
createXMLHttpRequest();
var url= "LoginValidate.ashx?username="+document.getElementById("username").value;
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=ShowResult;
xmlHttp.send(null);
//document.getElementById("Msg").innerHTML='';
}
//»Øµ÷·½·¨
function ShowResult()
{
if(xmlHttp.readyState==4)
{
if(xmlHttp.status=
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