James,

> > Although in the former case the function is called once for each node
> > ("somewhere" element) in the node set, and hence more naturally maps to
> > method call. In the latter case, the first argument is a node set (a set
> of
> > "somewhere" Elements). Isn't that correct and doesn't that make a
> > difference?
>
> Though the function could always iterate over the nodeset and execute its
> functionality on each node in the set, and return a new nodeset of all the
> results. Would that do?

No. There is a difference between iterating over a set and being called as a
method on each object in turn. Each object may have it's own method, like
the javascript function attached to each Element node, as in my case.

Hallvard


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