HTML代码如下:
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>验证用户名是否存在</title>
<script type="text/javascript">
var xmlHttp;
function createXMLHttpRequest()
{
if(window.ActiveXObject)
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest)
{
xmlHttp = new XMLHttpRequest();
}
}
//处理方法
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='';
}
//回调方法
function ShowResult()
{
if(xmlHttp.readyState==4)
{
if(xmlHttp.status=
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<asp:GridView ID="GvPubList" runat="server" AutoGenerateColumns="False"
......
