Animated Collapsible DIV - Toggle Images

[jc_gmk]

1) Script Title:
Animated Collapsible DIV
2) Script URL (on DD):
http://www.dynamicdrive.com/dynamici...edcollapse.htm
3) Describe problem:

I have used this script on my site and it works perfectly.

I am now trying to add an extra feature to it whereby there is a plus (+) image displayed next to the heading. I want this to be able to change to a minus (-) when the div is expanded and back to a plus when it is collapsed.
Is this possible. Maybe using OnClick?

[onlybrian]

There's a script that does that if you're interested:
http://www.dynamicdrive.com/dynamicindex1/slashdot.htm