(function() {
var eventMatchers = {
		'HTMLEvents': /^(?:load|unload|abort|error|select|change|submit|reset|focus|blur|resize|scroll)$/,
		'MouseEvents': /^(?:click|mouse(?:down|up|over|move|out))$/
	}
	var defaultOptions = {
		pointerX: 0,
		pointerY: 0,
		button: 0,
		ctrlKey: false,
		altKey: false,
		shiftKey: false,
		metaKey: false,
		bubbles: true,
		cancelable: true
	}

	Event.simulate = function(element, eventName) {
		var options = Object.extend(defaultOptions, arguments[2] || {});
		var oEvent,
		eventType = null;

		element = $(element);

		for (var name in eventMatchers) {
			if (eventMatchers[name].test(eventName)) {
				eventType = name;
				break;
			}
		}

		if (!eventType)
		throw new SyntaxError('Only HTMLEvents and MouseEvents interfaces are supported');

		if (document.createEvent) {
			oEvent = document.createEvent(eventType);
			if (eventType == 'HTMLEvents') {
				oEvent.initEvent(eventName, options.bubbles, options.cancelable);
			}
			else {
				oEvent.initMouseEvent(eventName, options.bubbles, options.cancelable, document.defaultView,
				options.button, options.pointerX, options.pointerY, options.pointerX, options.pointerY,
				options.ctrlKey, options.altKey, options.shiftKey, options.metaKey, options.button, element);
			}
			element.dispatchEvent(oEvent);
		}
		else {
			options.clientX = options.pointerX;
			options.clientY = options.pointerY;
			oEvent = Object.extend(document.createEventObject(), options);
			element.fireEvent('on' + eventName, oEvent);
		}
		return element;
	}

	Element.addMethods({
		simulate: Event.simulate
	});
})()