WebApp/login.aspx

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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="login.aspx.cs" Inherits="WebApp.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>留言本管理登录</title>
    <script src="js/jquery-1.3.2.min.js" type="text/javascript"></script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        用户名：<asp:TextBox runat="server" ID="txtname"></asp:TextBox>
    </div>
    <div>
        密码：<asp:TextBox runat="server" ID="txtpwd" TextMode="Password"></asp:TextBox>
    </div>
    <div>
        <asp:Button runat="server" Text="登录" ID="btnlogin" 
            OnClientClick="return chkd();" onclick="btnlogin_Click"  />
        <input type="button" value="返回" onclick="window.location='/';"  />
    </div>
    <script type="text/javascript">
        function chkd() {
            if ($("#txtname").val() == ""
            || $("#txtpwd").val() == "") {
                alert("用户名或者密码不能为空!");
                return false;
            }
        }
    </script>
    </form>
</body>
</html>