There are prehtml posthtml prejs postjs JavaScript events on select pages.
The prejs and postjs events are for the running of the JS not for the loading of scripts by the browser.
There can me multiple postjs events as it's triggered after any ajax that adds to the page.
Nothing other than custom scripts listen for these events.

Usage example:

function my_method(){alert("hello world");}
top.noodle.cbc.addEventListener(top.document.getElementById('main'), 'postjs', my_method);

or if you are using IE:

function my_method(e){if(e.noodle=="postjs"){alert("hello world");}}
top.noodle.cbc.addEventListener(top.document.getElementById('main'), 'propertychange', my_method);

All quiz answers should be quite short (no setup or output, many assumptions)

1. In IE with JavaScript get an xml object (as sent from the server) from an iframe
2. Dynamically call a java Class and method from within java
3. List the values of a column that have a 2nd column who's value is not in any other row with SQL
4. From a POISX CLI in one line individually compress all iso files in all sub directories using no loops and with the date inserted into the filenames
5. Output a Git histoy from the beginning of the year in the format "graph tab date tab message"

For each question:

1 point for doing something logical
1 point for understanding/answering the question asked
1 point for getting a working answer
1 bonus point for being concise or explaining why the question/answer is useful

Clearing the DNS cache on your computer:
windows:

ipconfig /flushdns

OS X:

dscacheutil -flushcache

linux:

/etc/init.d/nscd restart

You can't clear the cache on your ISPs DNS servers but you can use different servers (opendns, googledns, etc)

You need custom scripts enabled.

var doc=top.noodle.headWindow().document;
var el=doc.getElementById("helpLink");
el.style.fontSize="";
el=doc.getElementById("feedback");
el.style.fontSize="";
el=doc.getElementById("logout");
el.style.fontSize="";
el=doc.getElementById("logout").parentNode.parentNode;
el.style.fontSize="14px";

<div style="position:relative;">
<img src="some_image.png"/>
<a href="http://someurl.com" style="position:absolute;top:50px;left:50px;">some text</a>
</div>

How to change Java RAM usage

Linux:

/opt/Noodle/multiserver
MAX_MEMORY=512

Windows:

%PROGRAMFILES%\Noodle\intranet.bat
-Xmx512M

You need custom scripts enabled.

var doc=top.noodle.headWindow().document;
var el=doc.getElementById("status");
el.style.display="none";
el=doc.getElementById("currentUserId");
el.style.display="none";
el=doc.getElementById("currentUser");
el.style.margin="20px";
el=doc.getElementById("currentUserName").parentNode;
el.style.display="block";