function validate(){ var username=document.getElementById('login-username').value; var passowrd=document.getElementById('login-password').value; if (username === "daksh" && passowrd === 'daksh'){ alert('You have sucessfully logged in'); window.location.replace("http://stackoverflow.com"); } else{ alert('Wrong username or password'); return true; } }

 <div action="login.html" class="container"> <form method="POST" class="login-form"> <h1 class="login-heading">LOGIN FORM</h1> <input type="text" placeholder="User Name" id="login-username"> <br><br> <input type="password" placeholder="Password" id="login-password"> <br><br><br> <input type="submit" value="Login" id="login-submit" onclick="validate()"> </form> </div>