Know your (event) sources

A loooong time ago I wrote this tutoral on JavaScript events, in which I included a cross-browser event handling script called addEvent.

Today, Peter-Paul Koch: addEvent Considered Harmful. And he's right, you can get into all kinds of headaches using IE's attachEvent method, as my own addEvent snippet does. Be sure to read the ensuing comment thread for some interesting alternative approaches.

Caveat implementor, my friends.

PS: I'm rather pleased that something I wrote merits a "considered harmful" treatise! I'm in good company.