gistfile1.js

$( "#person-lookup" ).autocomplete({
    source: autoCompletePeople,
    select: function( e, ui ) {
      console.debug('set the field to ', ui.item.label);
      $('input#person-lookup').val(ui.item.label);
      $('input#person-to-add').val(ui.item.value);      
    }
  });