js ajax 无效了
前台页面代码：
程序代码：<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="JsAjaxJiShu_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.">
<html xmlns="http://www.">
<head runat="server">
<title></title>
<script type="text/javascript" language="javascript">
var request;
var resResule="";
function createRequest() {
try {
request = new XMLHttpRequest();
} catch (trymicrosoft) {
try {
request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (othermicrosoft) {
try {
request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (failed) {
request = false;
}
}
}
if (!request)
alert("Error initializing XMLHttpRequest!");
}
function change(){
var user = document.getElementById("<%= username.ClientID %>").value;
var url = "GetUsers.ashx?user=" + user + "";
createRequest();
request.open("get",url,true);
request.onreadystatechange = function showResult() {
if (request.readystate == 4) {
if (request.status == 200) {
resResule = request.responseText;
if (resResule == "1") {
message.innerHTML = username + "不能作为用户名注册";
}
else {
message.innerHTML = username + "可以注册";
}
}
}
}
request.send(null);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
用户名：<asp:TextBox ID="username" runat="server" onblur="change()"></asp:TextBox><span id = "message"></span>
</div>
<div>
密码：<asp:TextBox ID="password" runat="server"></asp:TextBox>
</div>
</form>
</body>
</html>GetUsers.ashx 页面代码：程序代码：<%@ WebHandler Language="C#" Class="GetUsers" %>
using System;
using System.Web;
public class GetUsers : IHttpHandler {
public void ProcessRequest (HttpContext context) {
string users = context.Request.QueryString["user"].ToString();
if (users.ToLower().Trim().IndexOf("admin") != -1)
{
context.Response.Write("1");
}
else
{
context.Response.Write("2");
}
}
public bool IsReusable {
get {
return true;
}
}
}
输入 admin后没反映。。。。
