page/client/kalendae.standalone.js
function (elem, event, listener) {
		if (elem.detachEvent) {	// IE only.  The "on" is mandatory.
			elem.detachEvent("on" + event, listener);
		} else { // Other browsers.
			elem.removeEventListener(event, listener, false);
		}
	}
function (elem, event, listener) {
		if (elem.detachEvent) {	// IE only.  The "on" is mandatory.
			elem.detachEvent("on" + event, listener);
		} else { // Other browsers.
			elem.removeEventListener(event, listener, false);
		}
	}
Removes a listener callback from a DOM element which is fired on a specified event.