Essentially , it uses the anchor text.
change #top to #bottom
add an anchor in your footer. called #bottom.
So basic code:
Code:
<a href="#Bottom">Bottom</a>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<a name="Bottom">Footer Anchor Point</a>
<a href="#Bottom">Bottom</a> is your link
<a name="Bottom">Footer Anchor Point</a> is your anchor in your footer