Orkut community Thread re-title (Greasemonkey)

This script allows you to change the titles of Orkut community threads while viewing them locally.
Tested with:
Ubuntu Hardy Heron 8.04
Firefox/3.0.1 (Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.1) Gecko/2008072820)
Greasemonkey 0.8.20080609.0

Of course, it's local - it doesn't actually affect the data on Orkut's servers and you don't need any special privileges in the community to use this.

Name changes are persistent (will remain even after the browser is restarted - I think the info is lost if you Ctrl+Shift+Del your cache).

Refer elsewhere for how to install a Greasemonkey user-script.
Test with: http://www.orkut.co.in/CommTopics.aspx?cmm=22317

This does have some minor bugs which I'll fix if someone is interested in using this.

// ==UserScript==
// @name Orkut Community Re-title 1.0
// @namespace tag:abhijitppai@gmail.com,2008-08-07:Algoretitle
// @description script to re-title Orkut community threads
// @include http://www.orkut.co.in/CommTopics.aspx*
// ==/UserScript==
function myclick() {
if(this.checked==true)
{
c = document.createElement('input');
c.type="text";
c.name="apt"+this.name;
c.value=GM_getValue(String(this.name),"");
this.parentNode.insertBefore(c, this.nextSibling);
}
else
{
c=document.getElementsByName("apt"+this.name)[0];
GM_setValue(String(this.name),c.value);
var link = this.parentNode.childNodes[1];

if(c.value!="")
{
//don't have old value saved yet
if(""==GM_getValue("orig"+this.name,""))
{
//save it
GM_setValue("orig"+this.name,link.innerHTML);
}
link.innerHTML = c.value;
link.style.color="red";
}
else
{
link.innerHTML = GM_getValue("orig"+this.name,"blank");
this.parentNode.childNodes[1].style.color="grey";
}
this.parentNode.removeChild(this.parentNode.childNodes[3]);
}
}

var allLinks, thisLink;
allLinks = document.evaluate(
'//a[@href]',
document,
null,
XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE,
null);

for (var i = 0; i < allLinks.snapshotLength; i++) {
thisLink = allLinks.snapshotItem(i);
var k = thisLink.href.search("&tid=");
if(k>0)
{
k=k+5;
b = document.createElement('input');
b.type="checkbox";
b.name=String(thisLink.href.substr(k));
vlue = GM_getValue(b.name,"");
if(vlue!="")
{
thisLink.innerHTML = vlue;
thisLink.style.color="red";
}
b.addEventListener("click", myclick, true);
//insert after
thisLink.parentNode.insertBefore(b, thisLink.nextSibling);
}
}