Simple JavaScript Login, Redirects to the user's page (Multiple Users)

Simple JavaScript Login, Redirects to the user's page (Multiple Users)

my school is doing a 5 day html challenge next week and i'm practicing my
idea,
To get to the point,
I want to make a login system using an external javascript script that
supports multiple users and when the two login forms are valid from the
certain part of the code it will redirect to the users page: I have the
two inputs set up:
<center> <h1> Join now! </h1> </center>
</header>
<p> Username </p> <input> </input><p> Password </p> <input> </input>
<button> Submit </button>
Feel free to make any adjustments needed to this code and I'd prefer not
to use database's for this project
Thanks for the help guys :)
Oh P.S, I only need a three user system
And you may user jquery aswell if necessary
Thanks Again