I have looked on the search like 10 times and found nothing. I needed to know how to get image links to fade, but darken on mouseover. I've seen this on sites before but I couldn't figure out how to do it... Can anyone help?

http://www.lissaexplains.com/forum/showthread.php?threadid=34662
or just go here:
http://www.dynamicdrive.com/dynamicindex4/highlightgrad.htm