Is there as way to find out if a link has been visited on a page?

if the link is 
<a href="http://www.blahblah.com id=mylink name=mylink >my link</a>

how would you test that "mylink" visited=true? I figure I will put the 
test in the body onload event.

I need javascript with and without dhtml since I know many of my visitors 
have not upgraded their browsers and there is an even mix of NS and IE.

Thanks in advance