var PopupWindow = Class.create();
PopupWindow.prototype = {
	initialize: function(className, parentElement) {
		var elements = document.getElementsByClassName(className, parentElement);
		for (var i = 0, len = elements.length; i < len; i++) {
    		Event.observe(elements[i], 'click', this.addPopupEvent.bindAsEventListener(this));
    		Event.observe(elements[i], 'keypress', this.addPopupEvent.bindAsEventListener(this));
		}
	},
	addPopupEvent: function(event) {
		var element = Event.element(event);
		var link = element.getAttribute('href');
		window.open(link);
		Event.stop(event);
	}
};

Event.observe(window, 'load', function () {
new PopupWindow('out');
});