& next()
 
  Syntax: next(<thing>)
 
  If thing is an exit in a room, then next will return the next 
  nondark exit in the list of exits for that room. If thing is an 
  object, then next will return the next object in the inventory list 
  that the object is in. Otherwise, it returns a '#-1' string.
 
  See Also: lexits(), lcon()