tmhl网页这个怎么弄

制作一个简单的登录表单，单击按钮提示欢迎某某同学
建立一个JavaScript函数，用alert提示欢迎你，某某同学，然后用按钮的onclick事件调用函数！


<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
   
    <title>登陆</title>
</head>
<body>
<main class="main" role="main">
    <div class="container">
        <div class="row">
            <div class="offset-md-3 col-md-6">
                <form class="form-container" >
                    <h2 style="text-align: center;">登陆</h2>
                    <div class="form-group">
                        <label for="exampleInputEmail1">用户名</label>
                        <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp" placeholder="请输入用户名">
                    </div>
                    <div class="form-group">
                        <label for="exampleInputPassword1">密码</label>
                        <input type="password" class="form-control" id="exampleInputPassword1" placeholder="请输入密码">
                    </div>
                   
                    <button type="submit" class="btn btn-success btn-block" onclick="login()">登录</button>
                </form>
            </div>
        </div>
    </div>
</main>
<script>
function login(){
        alert("欢迎你，xx同学")
    }

</script>
 

</body>
</html>

试试看