Using Yahoo Connection api

[squishi]

The vbulletin pages load the yahoo-dom-event and connection libraries.

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/yui/2.9.0/build/yahoo-dom-event/yahoo-dom-event.js?v=387"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/yui/2.9.0/build/connection/connection-min.js?v=387"></script>

I want to use those libraries to make ajax requests. I don't want to pack jquery on top of all the libraries that are already loaded.

So how would I make such a request?

Firstly, the documention for the yahoo connection manager states that "yahoo-min" is a prerequisite:
http://developer.yahoo.com/yui/connection/

I tried to do an ajax request like this, but nothing happens:

	var postData = "postid=12345&userid=$bbuserinfo[userid]&hash="+the_hash;

	var callback = {
		success:handleSuccess,
		failure: handleFailure,
		argument: ['foo','bar']
	};
	var handleSuccess = function(o){
		if(o.responseText !== undefined){
		div.innerHTML = "Transaction id: " + o.tId;
		div.innerHTML += "HTTP status: " + o.status;
		div.innerHTML += "Status code message: " + o.statusText;
		div.innerHTML += "<li>HTTP headers: <ul>" + o.getAllResponseHeaders + "</ul></li>";
		div.innerHTML += "PHP response: " + o.responseText;
		div.innerHTML += "Argument object: " + o.argument;
		}
	}
	var handleFailure= function(o){
	}

	var request = YAHOO.util.Connect.asyncRequest('POST', 'http://mydomain.com/myscript.php', callback, postData);

So how is the connection even working in vbulletin? Why is the connection manager loaded when it depends on the yahoo library?