title: How to highlight the potential drop areas in sortable before drop?
body: <p>I'm using JQuery's Sortable (not Draggable or Droppable) and I was wondering how I could highlight the potential drop areas (using CSS) that a user has when the user has begun sorting. Something like</p>
  
  <p><a href="http://www.shopdev.co.uk/blog/sortables.html" rel="nofollow noreferrer">http://www.shopdev.co.uk/blog/sortables.html</a></p>
  
  <p>but with highlighting the area in which the item can be dropped.</p>