add/attach event listeners for modern browsers and IE

addAttachEvents.coffee

addListener = (elt, type, fn) ->
	if elt.addEventListener then elt.addEventListener(type, fn, false) 
	else if elt.attachEvent then elt.attachEvent('on' + type, fn) 

addAttachEvents.js

addListener = function(elt, type, fn) {
	if (elt.addEventListener) {
		elt.addEventListener(type, fn, false);
	} else if (elt.attachEvent) {
		elt.attachEvent('on' + type, fn);
	}
};