MooTools: Events

Question

Let's save I have an Element:

var el = $('mooo');

What's the easiest way to set its 'onclick' attribute or event (it may already have one)?

Answer 1

MooTools handles all its event adding with the addEvent() function:

var el = $('mooo');
el.addEvent('click',function(){ alert("I got clicked!"); });

Event names simply have the "on" prefix removed, ie. 'click','mouseover','mouseenter', etc.

Answer 2

$('mooo').addEvent('click', function(e){
    // your code here.
    e.stop();
});

You mention, regarding events, that your element mooo may already have one. This should not affect this code.