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('blank');

});