or use an html solution...at the top of your page ouput code, create:

<a href="#a">A</a> | <a href="b">B</a> | etc....
[download]

and, at the appropriate points in your list ouput, have your script insert

<a name="a">
Alice
Andrew
Aunt Samatha
<a name="b">
Bruce
<a name="c">
Carol
Chuck
...
[download]

et cetera....