hashchange.js

(function(){
	var supported;
	if (document.body.setAttribute) {
		var el = document.createElement('div');
		el.setAttribute('onhashchange','return;'); 
		supported = typeof el.onhashchange == 'function';
	} else {
		supported = 'onhashchange' in document.documentElement;
	}
	if (!supported) {
		Element.Events.hashchange = {
			duration: 250,
			onAdd: function(){
				if (!Element.Events.hashchange.timer) {
					Element.Events.hashchange.timer = (function(){
						if (location.hash && location.hash != Element.Events.hashchange.state) {
							Element.Events.hashchange.state = location.hash;
							window.fireEvent('hashchange', new Event({
								bubbles: false,
								cancelable: false,
								currentTarget: window,
								eventPhase: 2,
								explicitOriginalTarget: document.getElementsByTagName('html')[0],
								originalTarget: window,
								target: window,
								timeStamp: $time(),
								type: "hashchange"
							}));
						}
					}).periodical(Element.Events.hashchange.duration)
				}
			}
		}
	}
})();