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<!DOCTYPE html>
<html>
    <head>
        <title>Start Page</title>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <script>
            function validform()
            {
                var uname = document.getElementById("uname");
                var pss = document.getElementById("pss");
                
                var expression = /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[\W_])[A-Za-z\d\W_]{8,}$/;
                
                if (!expression.test(pss.value))
                {
                    alert("Password does not match the requirement");
                    return false;
                }
                return true;
            }
      </script>
    </head>
    <body>
        <h1> login </h1>
        <form action="logincheck.jsp" method="post" onsubmit="return validform()">
            User Name:<input type ="text" name="uname" id="uname" >
            <br>
            Password:<input type="password" name="pss" id="pss">
            <br>
            <input type="submit" value="login" name="submit" id="submit">
            <br>
        
        </form>
    </body>
</html>
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