Event handlers vs. event listeners
Someone told me that event listeners are to add the possibility of an event onto something that doesn't already have a listener on it, whereas a handler would be used to handle something that already has a listener on it (i.e a link). But in this book, it says that event listeners are to always be used, as they are more efficient/powerful than handlers. In their examples, they even use a listener on a link.
SO, what's the difference/which should I use? Handlers seem much easier...