For jQuery, the answer tends to be "it doesn't matter." There are very fewplaces where we treat in-document and out-of-document situations differently.
OK. There's http://www.whatwg.org/specs/web-apps/current-work/multipage/forms.html#dom-label-control but it only works when in a document. Maybe that should be changed, though.
-- Simon Pieters Opera Software
