Answers for "in page navigation html"

go to id html

<a href="#sushi">Sushi</a>
<a href="#bbq">BBQ</a>

Sample section:
<div id='sushi'><a name='sushi'></a></div>
<div id='bbq'><a name='bbq'></a></div>

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>