Cancel the autocomplete after I leave the field

Question

Is there a way to stop the ui jQuery Autocomplete if the user leaves the page looking at the Documentation here I see many things

.autocomplete( "destroy" )
.autocomplete( "disable" )
.autocomplete( "close" )

but how do I use them after a user leaves the field

$("#request_song").autocomplete({
  source: function(req, add){
    $.getJSON('<%= ajax_path("trackName") %>', req, function(data) {
      var suggestions = data.suggestions;
      add(suggestions);
    });
  },
  change: function() {
    var main = $('#main_content');
    main.empty().append("<img id=\"throbber\" src='/pre_config/css/images/throbber.gif' alt='Loading. Please wait.' />");
    $("#band_events").load("/load_events/"+ escape($('#request_artist').val()), successCallback );
  },
});

Answer 1

Bind a blur event handler to the field (essentially a lost-focus event):

$("#request_song").blur(function(){
    // Using disable and close after destroy is redundant; just use destroy
    $(this).autocomplete("destroy");
});