Autocomplete question

Autocomplete question

I am using jQuery UI autocomplete and I have tried to set options for how I would like the results to act.  Only one of the options I have tried to set actually works and that is the "delay" option.  None of the options below work when I try setting them:
  1. scroll: 1,
  2. scrollHeight: 100,
  3. highlight: 1,
  4. autoFill: 1,
  5. width: 200,

Any ideas?