add: if (!this._enabled) return; 
context:     _btnClickListener: function(event) {        var btn = tw_getEventTarget(event);        var dm = btn.style.backgroundImage.indexOf("right") >= 0 ? 1 : -1;        this._incrementMonth(dm);    },
meta: 5515	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5515/37796fea05d0eb86951d2f34aedeb66e8b500920/DateBox.js/buggy/src/thinwire/render/web/resources/DateBox.js