how to navigate inside html page code example

Example 1: link to section on page html

<!-- #top is the ID of the div where u wanna link to -->
<a href="#top">Go back to the top!</a>

<div id="top"></div>

Example 2: html in page navigation

Uses HTML's anchors:
<a href="#anch_start">INTRO</a>
<a href="#anch_end">ENDING</a>

'href' uses 'id' to find these segments:
<div class="intro"  id="anch_start"></div> 
<div class="epic_ending"  id="anch_end"></div>