I use them in my blog all the time. I’m using word press, so it may not work, but the html is:
for the superscript:
and for the note on the bottom:
[p class=”footnote”][strong][a title=”footnote1″ name=”footnote1″][/a]1[/strong]
The [hr/] tag is for the line at the bottom, and obviously the “1” and such change for successive footnotes. As I said, just about every entry has a few.
However, in order to get it to work, each of the brackets needs to become an arrow<, facing in around the code, like this: < >. I keep it in a text document and cut and paste.