Quick help on xml PLease

How do I place links on these images thru XML? Please help! Thanks!

This is my AS:

var x:XML = new XML();
x.ignoreWhite = true;

var urls:Array = new Array();

x.onLoad = function(success) {
	var photos:Array = this.firstChild.childNodes;
	for(i=0;i<photos.length;i++) {
		urls.push(photos*.attributes.url);
	}
	holder.loadMovie(urls[0]);
	holder1.loadMovie(urls[1]);
	holder2.loadMovie(urls[2]);
	whoIsOn = 0;
}

x.load("banner.xml");


This is my XML:

<?xml version="1.0" encoding="ISO-8859-1"?>
<slideshow>
//NEED URL LINKS ON THESE IMAGES PLEASE!
<photo url="head1.jpg"/>
<photo url="head2.jpg"/>
<photo url="head3.jpg"/>

</slideshow>