Post Causing Errors

Is this from vBSEO?

Causing Webmaster errors from the p= when I have that disabled.

<script type="text/javascript">
//<![CDATA[

window.orig_onload = window.onload;
window.onload = function() {
var cpost=document.location.hash.substring(1);var cpost2='';if(cpost){ var ispost=cpost.substring(0,4)=='post';if(ispost)cpos t2='post_'+cpost.substring(4);if((cobj = fetch_object(cpost))||(cobj = fetch_object(cpost2))){cobj.scrollIntoView(true);} else if(ispost){cpostno = cpost.substring(4,cpost.length);if(parseInt(cpostn o)>0){location.replace('http://www.XXX.com/forum/showthread.php?p='+cpostno);};} }

if(typeof window.orig_onload == "function") window.orig_onload();
}

//]]>
</script>

What does Javascipt do?

Opps. Please delete this thread going to reply to other.