XML newbie

[greenawayr]

Hi,

Am just starting out in the XML world and was looking for some guidance.

I am writing a website with navigation menu, which contains three tiers of departments that need to be displayed.

For example

Activities
Everyday
In the Home

With the first two tiers being displayed all the time and the third tier being revealed when rolled over.

Now we have all of this set up to work in html and the correct javascript etc, but now I was planning on using an XML file, to store all of our departments in, so when I make a change to the navigation menu, the change is the same for all the pages.

As I said, I'm a newbie at this so I would appreciate

a) confirmation that I'm using the correct method to achieve this.
b) a kickstart for the code for the XML page so I can see what it should look like
c) an example of what should be put in thwe HTML code to call the XML file.

I'm pretty confused by the whole thing at the minute, and reading the jargon filled tutorials I found online hasn't helped much.

Thanks in advance.