Make sure that you submit a correct call each time you
start an internet session. This can be achieved by
defining the link as the opening page of your
browser or by including it in the opening page of
your browser (which must not be the page with your
hit counter!).
Using dimensions of 1×1 pixel will
make the resulting message practically invisible,
but still send your IP address.
<img src="http://www.qwd.biz/cgi-bin/blockip.pl?code=xyz"
height="1" width="1" type="image/png" alt="" />