Adds a new attribute node. If an attribute with that name (
nodeName) is already present in the element, it is
replaced by the new one. Replacing an attribute node by itself has no
To add a new attribute node with a qualified name and namespace URI, use the
| The |
newAttr attribute replaces an existing
attribute, the replaced
Attr node is returned,
null is returned.
| WRONG_DOCUMENT_ERR: Raised if |
NO_MODIFICATION_ALLOWED_ERR: Raised if this node is readonly.
INUSE_ATTRIBUTE_ERR: Raised if