Some mootools advice?

Been playing around with MooTools.

From the tutorials I’ve found, I read that to give functionality to a div, I should use the addEvent(‘click’, function(){}); method. However, I found the same could be done using

<a href=‘javascript:myspecificfunction(arg)’>Text</a>

And with the first method (using addEvent) I simply don’t see any way of actually passing any arguments to the function. So is that a bad way? Or perhaps, maybe addEvent is more for rollOvers and the sort?

Any gurus?