title: How can I create an HTML popup?
body: <p>I want to add a little html popup that opens a user clicks on a "log in" link. Then a little window should open up where I can put the form fields for logging in. I want it to look like the one in the image, which I have seen on multiple sites.</p>
  
  <p><img src="https://i.stack.imgur.com/7bzf0.jpg" alt="alt text"></p>
  
  <p>How can I do that?</p>
  
  <p>Thanks for the help!</p>