That's the basics of web experience... you've visited  the link, therefore
the color  will be changed  until you clear  your browser cache.

Alternatively it sounds like you're more interested in a:hover rather than
a:visited

For more about web development, I would check out the following:

www.w3.org/.../selector.html#link-pseudo-classes

www.w3schools.com/css/css_pseudo_classes.asp

And on a side note, best practice is to not change ows.css but to create
your own custom style sheet to lay over it. Might want to pick up
O'Reilly's css  Definitive Guide as well...

To add what gg has said, you can create a css  and link  that in the
master page  or through the UI via SiteSettings->MasterPages (Only for
MOSS and if you have the proper permissions).

Heather Solomon's MOSS css reference guide will have the css class
that you are looking for. Good luck,
chris

www.heathersolomon.com/.../sp07cssreference.htm

well i m intrested in visited  color link  after refresh  and i m using
SPS2003.
that it should be changed  to normal link when user  visit next time. but due
to it'shistory it shows the visited color.

how to refresh the cache or else to create the own css  and how to apply it
to perticular wss  site.
as OWS.css is universal CSS. is this will change the it's looks?
any sugesstions??

That would be an Internet Explorer function, not SharePoint. IE uses the
history information to determine whether you have visited  the site
before or not.

To test this, have the same user  load the page  on a different
workstation. Obviously, he has visited the site before, but not from
that machine so the link  will not be red.