gistfile1.txt

over = {
    amount: 20,
    ready: true,
    anim: function(dir, el) {
        amount = dir * this.amount;
        if (this.ready) {
            this.ready = false;
            el.animate({
                left: '+=' + amount,
                top: '+=' + amount
            }, JQuery.proxy(function() {
                alert(this.ready);
            }, this));
        }
    }
}