[CS3] How do I alter an attribute in an XML file?

[quddusaliquddus]

Hi all ,
How do I alter an attribute in an XML file using AS 3.0?

I have the folloiwng XML file:

<Books>
	<Book ISBN="987854">
		<title>Sherlock Holmes</title>
		<author>Sir Aurthur
</author>

	</Book>

	<Book ISBN="987854">
		<title>Sherlock Holmes</title>
		<author>Sir Aurthur</author>
	</Book>

	<Book ISBN="987854">
		<title>Sherlock Holmes
</title>

		<author>Sir Aurthur</author>
	</Book>

	<Book ISBN="987854">
		<title>Sherlock Holmes
</title>

		<author>Sir Aurthur</author>
	</Book>
</Books>

And the following code in AS 3.0:

var xmlLoader:URLLoader = new URLLoader();
var xmlData:XML = new XML();
 
xmlLoader.addEventListener(Event.COMPLETE, LoadXML);
 
xmlLoader.load(new URLRequest("sampleXML.xml"));

function LoadXML(e:Event):void {
xmlData = new XML(e.target.data);
ParseBooks(xmlData);
}

function ParseBooks(bookInput:XML):void {
	xxx.text=bookInput.Book.author[0];
}

where xxx is a textbox.

Basically I want to be able to press a button and the AS 3.0 should alter the XML file e.g. change the authors name.

Thanks !

Q