title: How to make a simple modal window?
body: <p>guys!</p>
  
  <p>Can anyone help to understand how to make a simple modal window? Like to make a fade out background of the web page's content and show a white layer focusing action on it.</p>
  
  <p>I'm going to put on that white focused layer turing number form with ajax query. So if somebody enters the page, first he will see the modal window where he / she will need to fill turing number then by pushing "Submit" button, AJAX will check for correct turing number and show the page if not, it will display an error.</p>
  
  <p>I need just to make modal window without including any libraries like jquery. I want to make a simple modal window with CSS.</p>
  
  <p>Thanks in advance, guys!</p>