 
<!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> 
<title></title> 
<script src="js/Jquery1.7.js" type="text/javascript"></script> 
<script type="text/javascript"> 
$(function () { 
$('#Button1').click(function () { 
var username = $('#txtUserName').val(); 
var pwd = $('#txtPwd').val(); 
$.ajax({ 
type: "post", 
contentType: "application/json", 
url: "WebService1.asmx/Login", 
data: "{username:'" + username + "',pwd:'" + pwd + "'}", 
success: function (bukeyi) { 
if (bukeyi.d == 'true') { 
window.location = 'HTMLPage1.htm'; 
} 
else { 
$('#divinfo').text("用戶名或密碼錯誤"); 
} 
} 
}) 
}) 
}) 
</script> 
</head> 
<body> 
用戶名<input id="txtUserName" type="text" /><br /> 
密碼<input id="txtPwd" type="text" /><br /> 
<input id="Button1" type="button" value="登錄" /><br /> 
<div id="divinfo"></div> 
</body> 
</html> 

------WebService1.asmx----

復(fù)制代碼代碼如下:

 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Services; 
namespace ajax11 
{ 
/// <summary> 
/// WebService1 的摘要說明 
/// </summary> 
[WebService(Namespace = "http://tempuri.org/")] 
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] 
[System.ComponentModel.ToolboxItem(false)] 
// 若要允許使用 ASP.NET AJAX 從腳本中調(diào)用此 Web 服務(wù)，請取消對下行的注釋。 
[System.Web.Script.Services.ScriptService] 
public class WebService1 : System.Web.Services.WebService 
{ 
[WebMethod] 
public string HelloWorld() 
{ 
return "Hello World"; 
} 
[WebMethod] 
public string ValidateUser(string username) 
{ 
if (username == "onlifes") 
{ 
return "用戶名已被占用，請選擇其他"; 
} 
else 
{ 
return "可以使用，請繼續(xù)"; 
} 
} 
[WebMethod] 
public string GetDate() 
{ 
return DateTime.Now.ToString("yyyy-MM-dd hh:mm:ss"); 
} 
[WebMethod] 
public string Login(string username, string pwd) 
{ 
if (username == "admin" && pwd == "888888") 
{ 
return "true"; 
} 
else 
{ return "false"; } 
} 
} 
} 