<a href="http://www/me2/darkwing/"
onMouseOver="document.pic#.src='on.jpg'"
onMouseOut="document.pic#.src='off.gif'">
<img src="off.gif" NAME=pic# alt=happy border=0>
</a>
Count the number of pics on the page up to 'off.gif'.
If 'off.gif' is the 4th pic on your page replace # with 4.
As you can tell this may not be the best method for rollovers
but it's the only one I've got so far ;)