title: Client does not want invalid logins to redirect
body: <p>I would like to ask this question to developers who have a good sense of design. I see that whenever a website uses a popup box for their login page, they will always post and then redirect to the next page whether it be content or a dedicated login page for an invalid login error. </p>
  
  <p>I have a client who has been asking to cut out as much page refreshing as possible, including the login function. They would like to see the login error appear on the login popup box without a page refresh. </p>
  
  <p>I have not noticed a web based businesses do this, so I'm wondering if there's a valid reason to avoid this. I personally think that a page refreshing allows users to recognize their input has been registered and the next page appearing will be a solid response to their action either good or bad. </p>
  
  <p>Having no refresh and expecting the user to notice that some error text has appeared seems like a bad idea?</p>