Programmer's Guide > Interfaces > W3C NamedNodeMap interface > setNamedItemNS method
  
setNamedItemNS method
Adds a node using its namespaceURI and localName. If a node with that namespace URI and that local name is already present in this map, it is replaced by the new one.
HTML-only DOM implementations do not need to implement this method.
setNamedItemNS(arg )
Parameters
Nodearg
A node to store in this map. The node will later be accessible using the value of its namespaceURI and localName attributes.
Returns
Node. If the new Node replaces an existing node the replaced Node is returned, otherwise null is returned.
Throws
DOMException
WRONG_DOCUMENT_ERR: Raised if arg was created from a different document than the one that created this map.
NO_MODIFICATION_ALLOWED_ERR: Raised if this map is readonly.
INUSE_ATTRIBUTE_ERR: Raised if arg is an Attr that is already an attribute of another Element object. The DOM user must explicitly clone Attr nodes to re-use them in other elements.