Link:
<a href="#AnchorName">VisibleTextLeadingToTarget</a>
Visible target:
<a name="AnchorName">VisibleTargetText</a>
Invisible target:
<a name="AnchorName"></a>
The anchor name shows in the address bar of the browser. You can use any name, provided you use the same one for the link and its target, and a different one for another link & target pair. The two visible texts can be identical or not.
For intance, in the beginning you can have:
<a href="#ch2">Skip to Chapter II</a>
<a href="#ch3">Skip to Chapter III</a>
etc.,
before the beginning of the actual Chapter II:
<a name="ch2"></a>
before the beginning of the actual Chapter III:
<a name="ch3"></a>
etc.