title: Get div height in pixels although its height set to 100%
body: <p>I wonder if there is any way to get div height in pixels, although its height set earlier to 100% height.<br>
  This is required as div content is dynamic so div height has different values based on content itself.  </p>
  
  <p><strong>[Edit]</strong>
  Div by default is hidden.</p>
  
  <p>I need to get div height in pixels for later manipulation (smooth scrolling will be done for div)?<br>
  Is there any way to do this?</p>