[Moo] Trouble using $clear()

[Gafa]

Here is a code snipit.  When the drag onComplete event is fired, the
variable fnCount becomes cleared but the periodical still runs.  It's
not clear to me what I'm doing wrong. Thanks for any help.

initRecordAnimation: function() {
        this.controlCoordinates = new Array();
        var i = 0;
        var fnCount;

        $(this.options.activeControl).makeDraggable({
            onStart: function() {
                //start time counter
                if ($('chkRecord').checked) {
                    var x = { counter: 0 };
                    fnCount = function() { $('divAnimationTime').set
('html', '<b>Time: ' + this.counter++ + '</b>'); }
                    fnCount.periodical(1000, x);
                }

            },
            onDrag: function(el) {
                if ($('chkRecord').checked) {
                    this.controlCoordinates[i] = el.getPosition();
                    i++;
                    $('divNumberOfFrames').set('html', '<b>frames: ' +
i + '</b>');
                }

                this.updateControlPosition($
(this.options.activeControl));
            } .bind(this),
            onComplete: function() {
                this.animationNumberOfFrames =
this.controlCoordinates.length;
                fnCount = $clear(fnCount);

            } .bind(this)
        });
    },