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Jquery的登陆验证

jQueryUIWebAjaxSecurity 
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前端代码:login.aspx 
 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %>

<!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 runat="server">
    <title>Login Page</title>
    <script src="jQuery.js" type="text/javascript"></script>
<script language="javascript" type="text/javascript">
$(document).ready(function(){
    $("#btnLogin").click(function(){
        Login();
    });
});

function Login(){
    if(Check())
    {
        LoginSuccess();
    }
}

function Check(){
    if($("#txtUser").val()=="")
    {
        alert("The user isn't empty");
        $("#txtUser").focus();
        return false;
    }
    if($("#txtPassword").val()=="")
    {
        alert("The Password isn't empty")
        $("#txtPassword").focus();
        return false;
    }
    return true;
}

function LoginSuccess(){
    $.ajax({
            type:"POST",
            url:"CheckLogin.aspx",
            data:{userName:$("#txtUser").val(),userPwd:$("#txtPassword").val()},
            beforeSend:function(){$("#msg").html("logining");},             
            success:function(data){
           $("#msg").html(decodeURI(data));            
            }            
         });
    }

</script>
</head>
<body>
    <form id="form1" runat="server">
    <div style="margin-left:32px;">    
        <a>User:</a><input id="txtUser" type="text"  />
    </div>
    <div>
        <a>Password:</a><input id="txtPassword" type="text" />
    </div>
    <div id="msg"></div>
    <div>
        <input id="btnLogin" type="button" value="Login" /></div>
    </form>
</body>
</html>

后台代码 : 
 
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class checkLogin : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            string retVal = "";
            string userName = Request["userName"];
            string userPwd = Request["userPwd"];
            if (userName == "ike" && userPwd == "123")
            {
                retVal = "Login is success";
                
            }
            else
            {
                retVal = "Login is false";
            }
            Response.Write(retVal);
        
        }
   
    }
}


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