[JavaScript] Script without script tag?

Hello, was looking at a tutorial on AJAX here -
http://www.htmlgoodies.com/beyond/javascript/article.php/3702926 - and I
didn't understand something that I am apparently not aware of: why are there
no tags around the JS and where is the "javascript" CSS class? Are these
connected in some way (doubtful, but just in case I was not aware of
something arcane)? I have not seen code without script tags surrounding the
code. Can you point me to a short tutorial or reference about this?
A sample of what they do in the article:

<div style="width: 700px;">
<textarea name="code" class="javascript" cols="60" rows="10">
var Ajax = new Object();
Ajax.isUpdating = true;
Ajax.Request = function(method, url, callback)
{
this.isUpdating = true;
this.callbackMethod = callback;
this.request = (window.XMLHttpRequest)? new XMLHttpRequest(): new
ActiveXObject("MSXML2.XMLHTTP");
this.request.onreadystatechange = function() { Ajax.checkReadyState(); };
this.request.open(method, url, true);
this.request.send(url);
}
Ajax.checkReadyState = function(_id)
{
switch(this.request.readyState)
{
case 1: break;
case 2: break;
case 3: break;
case 4:
this.isUpdating = false;
this.callbackMethod(this.request.responseXML.documentElement);
}
}
</textarea>
</div>

--
Jonathan Berry, M.A.
IT Consultant
619.306.1712(m)
jcharlesberry@gmail.com
"I think the real reason the Extropy Institute closed is because Ayn Rand
rose from her cryo-sleep" -digibrill
____
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