MutationObserver polyfill

A small polyfill to handle mutation observer subtree modifications events

(function() {
 var MutationObserver;

 if (window.MutationObserver != null) {
 return;
 }

 MutationObserver = (function() {
 function MutationObserver(callBack) {
 this.callBack = callBack;
 }

 MutationObserver.prototype.observe = function(element, options) {
 this.element = element;
 return this.interval = setInterval((function(_this) {
 return function() {
 var html;
 html = _this.element.innerHTML;
 if (html !== _this.oldHtml) {
 _this.oldHtml = html;
 return _this.callBack.apply(null);
 }
 };
 })(this), 200);
 };

 MutationObserver.prototype.disconnect = function() {
 return window.clearInterval(this.interval);
 };

 return MutationObserver;

 })();

 window.MutationObserver = MutationObserver;

}).call(this);

And for who might appreciate, here's the coffeescript version ;-)