mootools fire click event. How to pass own data?

Question

I have a click event to a parent element and delegated the event to its children. However, I want to be able to fire this click and pass in the simulated click event's information to the event listener.

$('rt-main').addEvent('click:relay(.catClick)', function(e){
        e.stop();
        new Request({
            method: 'get',
            url: 'index.php?option=com_categories&tmpl=component&view=listing&cat=' + this.get('id'),
            onComplete: function(response){
                $('rt-main').set('html', response);
            }
        }).send();
});

// Here I want to fire the event. But how to pass in 'id' of my choosing?
// I know that this particular line fires the first anchor. How do I target a 
//   psuedo-anchor? Or is it better to target a class?
$('rt-main').fireEvent('click', 
    {target: $('rt-main').getElement('a'), stop: Function.from}
);

Answer 1

Dimitar is correct. You simply pass id: "data" in the arguments, and add a check in the event handler for the passed in data.

Here's a JSFiddle: http://jsfiddle.net/JT7MG/