title: How to make jQuery UI Autocomplete so that when users starts typing other content goes modal?
body: <p>I would like that when users start to use jquery UI autocomplete (element gets a focus, or a user starts to type), that other content (outside of the elements shown by autocomplete) looks like being under a modal window.</p>
  
  <p>When the element loses a focus, other elements outside of autocompleter shall look normal. </p>
  
  <p>Similar behavior is used by TripAdvisor (at this moment), you can see at TripAdvisor website that when users start typing in a search box, other content looks like being behind a modal window. </p>
  
  <p>How to achieve that with jqueryUI? </p>