Event listener versus event handler

Question

Can someone explain what is the proper way for certain actions to call functions in javascript? Should I use event handlers such as onclick="callFunction();"? Or should I use an event listener? If so, how do they work?

Answer 1

Read this:

http://www.quirksmode.org/js/events_tradmod.html

Then read the following:

http://www.quirksmode.org/js/events_advanced.html