Adopts a node from an external document. The node and its subtree is removed from the document it's in (if any), and its
ownerDocument is changed to the current document. The node can then be inserted into the current document.
Supported since Gecko 1.9 (Firefox 3)
var node = document.adoptNode(externalNode);
nodeis the adopted node that can be used in the current document. The new node's
null, since it has not yet been inserted into the document tree.
externalNodeis the node from another document to be adopted.
In general the
adoptNode call may fail due to the source node coming from a different implementation, however this should not be a problem with browser implementations.