The following example shows how dynamic footnotes might be included in a document...
Any browser-specific comments can be found in brackets here --
In a typical paragraph with footnotes, there is a bunch of text, followed by a note. The note is represented, as here, by a hypertext . That link should, as a matter of style, be indicated in the form of a number, as here . Footnotes can, with some browsers, be set up with a timeout feature, as with this link. I have set this one to time out after 4 seconds. To test this feature properly in a variety of browsers, I have inserted notes that appear in those browsers.