What is this?

[harvey]

Can somebody explain this?

<!--
d=document;
d.write("<img src=\"http://****.***");
d.write("/in.gif?");
d.write("****&");
d.write(escape(top.document.referrer));
d.write("\" width=1 height=1 align=\"right\" alt=\"\">");
// -->
</script>

(data cloaked by me)

Additionally, all links at the body looks like this

<a href="http://***.******.com/cj.php?****">

I'm not sure about this so I'd like your opinion

[Crunch]

It's just another way of tracking hits and referrers