It's supposed to say that for the link code; if you check out the page source it's actually:
<img name="avimg" border="1" src="/forum/images/forumimages/default/wcw9.jpg" alt="" /> <a href="javascript:void(0);" onclick="launch_avatar_window();">Change</a>
The "onclick" takes charge, and as it's a link it needs to have a dummy code, html it'd be linking to # or javascript it'd use javascript:void();