Changing A attributes onclick event via dom

Is there a way to change just the onClick action via the dom or do you have to change the entire element like:

createElement("<a href='#' onClick=\"methodName(" + action + ")\">text</a>");

Cheers, :thumbsup:
Daf

DOM 0…

Presuming the value of action var has been set prior to this instruction…
obj.onclick = function() { methodName(action) }

worked a charm, thanks! :p