HyperLesson/Login.aspx

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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Login.aspx.cs" Inherits="HyperLesson.Login1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>📕秋水长天选课管理系统</title>
    <link href="../Script/css/login.css" rel="stylesheet" />
    <style>
        .loginmain{
            border-radius:30px;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server" method="post">
        <div>
            <div class="loginmain">
            <div class="login-title">
                <span style="color: gold;font-size: 18px;font-family:'Gudea', sans-serif;letter-spacing:5px;font-weight:500;opacity:0.8;">秋水长天选课管理系统</span>
            </div>
                <div class="login-con">
                    <div class="login-user">
                        <div class="icon">
                            <img src="../Script/image/user_icon_copy.png" alt=""/>
                        </div>
                        <asp:TextBox ID="userName" type="text" placeholder="用户名" autocomplete="off" runat="server" onkeyup="value=value.replace(/[^\w\.\/]/ig,'')"></asp:TextBox>
                    </div>
                    <div class="login-pwd">
                        <div class="icon">
                            <img src="../Script/image/lock_icon_copy.png" alt=""/>
                        </div>
                        <asp:TextBox ID="userPwd" placeholder="密码" oncopy="return false" oncut="return false" onpaste="return false" autocomplete="off" type="password" runat="server"></asp:TextBox>
                    </div>
                    <div class="login-pwd">
                        <div class="icon">
                            <img src="../Script/image/key.png" alt=""/>
                        </div>
                        <asp:TextBox ID="text" placeholder="验证码" autocomplete="off" runat="server" Width="90px" style=""></asp:TextBox>
                        <canvas id="canvas" width="100" height="41" onclick="dj()" style="border: 0px solid;border-radius: 5px;float: right;margin-right: 34px;"></canvas>
                    </div>
                    <div class="login-btn grid">
                            <asp:Button ID="loginteacher" runat="server" Text="教师登录" OnClick="loginteacher_Click" OnClientClick="return sublim();" />
                            <asp:Button ID="loginstudent" runat="server" Text="学生登录" OnClick="loginstudent_Click" OnClientClick="return sublim();" />
                    </div>
                </div>
            </div>
        </div>
        </form>
</body>
</html>
<script>
    var show_num = [];
    draw(show_num);
    function dj() {
        draw(show_num);
    }
    function sublim() {
        var val = document.getElementById("text").value;