The NEXTID element is included for historical
reasons only and is may be generated by some older text
editors. HTML documents should not contain NEXTID elements any more.
The element is meant to give a hint for the NAME value to use when
creating a new hyperlink element instance (A) while editing an HTML
document and should be distinct from all NAME attribute values on
other A elements. This element was introduced in
HTML 2 but has since disappeared in later versions.
Attributes:
n - Identifies the value of this
attribute as a unique naming system for use in creating new anchor (A)
tags within the document.