https://waynecountypa.gov/Assets/Scripts/RWD/eventListener.js

1// addEventListener polyfill IE6+
2// https://gist.github.com/jonathantneal/2869388
3!window.addEventListener && (function (window, document) {
4	function Event(e, element) {
5		var instance = this;
6
7		for (property in e) {
8			instance[property] = e[property];
9		}
10
11		instance.currentTarget = element;
12		instance.target = e.srcElement || element;
13		instance.timeStamp = +new Date;
14
15		instance.preventDefault = function () {
16			e.returnValue = false;
17		};
18		instance.stopPropagation = function () {
19			e.cancelBubble = true;
20		};
21	}
22
23	function addEventListener(type, listener) {
24		var
25		element = this,
26		listeners = element.listeners = element.listeners || [],
27		index = listeners.push([listener, function (e) {
28			listener.call(element, new Event(e, element));
29		}]) - 1;
30
31		element.attachEvent('on' + type, listeners[index][1]);
32	}
33
34	function removeEventListener(type, listener) {
35		for (var element = this, listeners = element.listeners || [], length = listeners.length, index = 0; index < length; ++index) {
36			if (listeners[index][0] === listener) {
37				element.detachEvent('on' + type, listeners[index][1]);
38			}
39		}
40	}
41
42	window.addEventListener = document.addEventListener = addEventListener;
43	window.removeEventListener = document.removeEventListener = removeEventListener;
44
45	if ('Element' in window) {
46		Element.prototype.addEventListener = addEventListener;
47		Element.prototype.removeEventListener = removeEventListener;
48	} else {
49		var
50		head = document.getElementsByTagName('head')[0],
51		style = document.createElement('style');
52
53		head.insertBefore(style, head.firstChild);
54
55		style.styleSheet.cssText = '*{-ms-event-prototype:expression(!this.addEventListener&&(this.addEventListener=addEventListener)&&(this.removeEventListener=removeEventListener))}';
56	}
57})(window, document) && scrollBy(0, 0);