home.html

<html>
    <head>
        <title>FORM</title>

        <link rel="stylesheet" type="text/css"  href="style.css">

         <script>
             function myfunction()
              {
                    var x = document.forms["myForm"]["tex"].value;
                    if (x == "") 
                    {
                        alert("UserName must be filled out");
                        return false;
                        document.getElementById('dem').innerHTML="required";
                    }
                    var y= document.forms["myForm"]["tex1"].value;
                    if (y == "") 
                    {
                        alert("Password must be filled out");
                        return false;
                    }
                    var z = document.forms["myForm"]["tex2"].value;
                    if (z == "") 
                    {
                        alert(" please confirm password");
                        return false;
                    }
               }
         </script>
    </head>
    <body>
        <div class="container">

            <h1>Registration Form</h1>
            <form name="myForm" action="page.html" onsubmit="return myfunction()" method="post">
                <p>Username</p>
                <input type="text" name="tex" style="height: 10%; width: 60%;">
                <p id="dem"></p>

                <p>Password</p>
                <input type="password" name="tex1" style="height: 10%; width: 60%;">
         
                <p>Confirm Password</p>
                <input type="password" name="tex2" style="height: 10%; width: 60%;">
                <br>
                <br>

                    <input type="submit" class="sub" value="Register" style="background-color: blue; 
                    width: 60%; height: 10%;color: aliceblue; font-size: medium; 
                    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;" >            
            </form>
            

        </div>
        
    </body> 
    
    

</html>