Html form that updates xml file?

1

I have flash reading an XML file, which I manually edit every update:

<?xml version="1.0" encoding="iso-8859-1" ?> 
- <Events>

<Event DateOf="2/18/2006" Type="0" Header="The Khyber" Content="V.I.P."/> 

 </Events>

I want my client to be able to just go to a “simple” html form that let’s him edit:

“DateOf”
“Header”
“Content”

and hit submit/update

How should I go about this? THANKS!