[jQuery] [Autocomplete] Detecting mustMatch failure.

[jQuery] [Autocomplete] Detecting mustMatch failure.


I have a number of fields that are using the AutoComplete plugin
instead of select menus. When a user enters and selects a match a
number of other fields are populated via a .getJSON.
    $("#f_orig_lookup")
        .autocomplete(
            "index.php",
            loc_lookup_obj) // loc_lookup_obj is a shared configuration object.
        .result(function(event, data, formatted) {
            if (data){
                $.getJSON(
                    "?type=remote&action=location_by_id&id="+data[1],
                    function(data){
                        loadLocationInfo(data,'orig');
                    });
            } else {
                // debug
                alert ('no data'); // <- THIS NEVER ALERTS
            }
        });
The problem I have is this. A user does a lookup, then returns to the
same field and enters non-matching text. The mustMatch causes the
autocomplete field to clear, but the autocomplete .result doesn't
fire
What I need to do is clear any pre-filled fields if mustMatch. Is
there any easy way to detect that the mustMatch did it's job?