[jQuery] how to remove a behavior?

[[EMAIL PROTECTED]]

Hi,

I have this function ...

        function defineBehaviors() {
                $('a.deleteWorksheetItem').click( function() {
                    alert("Executing action");
                });
        }

and I notice (at least in PC Firefox) if I call this function twice on
a page, clicking the link causes the action to be executed twice -- in
the above case, there are two alert boxes.  My question is, how can I
prevent the action from being defined multiple times or how do I
remove any function associated with the action before re-defining it?

Thanks, - Dave