title: Sliding div into view, but in middle of screen
body: <p>Were all familiar with using jQuery and hidden divs to slide divs into view from off screen, but is there a concept of sliding a div into view in the middle of a screen?</p>
  
  <p>For example, if I click on a navigation item in a navbar - not at the edge of the screen - then having a subnav slide into view immediately below or next to it.</p>
  
  <p>I have a feeling I've seen this, but I can't seem to find out how to do it.</p>
  
  <p>Thanks.</p>