On Tue, 30 Aug 2011 11:58:21 +0200, Robin Berjon <robin at berjon.com> wrote: > But node.ownerDocument.contains(node) isn't. There's no doubt that > node.inDocument is less error-prone though. Depends on the use case. The thread started with "the document" in which case you want document.contains(). -- Anne van Kesteren http://annevankesteren.nl/