Untitled

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<form>
        <input id="user" type="text" name="username"
placeholder="username">
        <input id="pass" type="password" id="pass" name="password">
        <input id="subm"type="button" name="submit" value="submit"
onclick="checkPswd();">
</form>
</body>

<script type="text/javascript">
       function checkPswd(){
        var confirmpassword = "admin";
        var username = document.getElementById('user').value;
        var password = document.getElementById("pass").value;

            if(password == confirmpassword){

                window.location.href = "redu.html";

            }else{
                alert('try again');
            }

       };

 </script>
</html>