Wikimedia Bugzilla is closed!

I think they are not that hard to recover :

the user name is in : id="pt-userpage" > A > text node
the page name is in : id="ca-nstab-main" > A > HREF parameter

for example, for the page name, you can use something like : 

function retrievePageName() {
  var temp = document.getElementById("ca-nstab-main")
  temp = temp.getElementsByTagName("A") //return an array with only one case
  temp = temp[0].getAttribute("HREF") //now we have a string "/wiki/articleName"
  return temp.substring(7, temp.length) //return the string after cutting "/wiki/"
}

note that I didn't test this function, just wrote it "on the fly", and also I
have the bad habit to re-use variables anytime I can which can be ake code a bit
confusing to read)

A response to Darkoneko's comments:

> the user name is in : id="pt-userpage" > A > text node

This one does seem simple. I use this:

document.getElementById('pt-userpage').getElementsByTagName('a').item(0).firstChild.nodeValue;

> the page name is in : id="ca-nstab-main" > A > HREF parameter

This one is not so simple. Not every page has "ca-nstab-main". I use this:

document.getElementById('p-cactions').getElementsByTagName('ul').item(0).getElementsByTagName('li').item(0).firstChild.href;

Specifically, we need something which works on all skins, whether viewing,
diffing, editing, previewing, etc.

We might also have to think about what, if anything, it should return on special
pages.

I just noticed this new javascript section today:

<script type= "text/javascript">
var skin = "monobook";
var stylepath = "/skins-1.5";

var wgArticlePath = "/wiki/$1";
var wgScriptPath = "/w";
var wgServer = "http://en.wiktionary.org";
                        
var wgCanonicalNamespace = "";
var wgPageName = "south-south-east";
var wgTitle = "south-south-east";
var wgArticleId = 201743;
                        
var wgUserName = "Hippietrail";
var wgUserLanguage = "en";
var wgContentLanguage = "en";
</script>

It provides more than I asked for in a very nice way.

Fixed in r15871.