how to display data's from xml to html page

[Anil Verghese]

hi!
i was attend one interview..almost i completed all my interview rounds.
now they given a task for final thing.
This is my task:
The Project should only consists of *.html,*.css,*.js,*.xml.
so ,i decided to store my data into xml file ...and i am going to display the data's into the html page.
now my concept is this:
i have contact list inside that i have Friends,Family,Workers.
Each list i have First Name and Last Name.
so these data's are i have to display in Tree Structure Format into the html file..
when the user Clicks the Friends ,Family,Workers folder Should close and hides contact within it.
for eg:
when the user clicks the Friends Folder the name List should display like this:

-contact
-Friends
-Jean-Louis Durant
-Rene Norega
+Family
+Work

so ,
when the User Clicks Jean-Louis Durant then Two Text Fields are there In My HTML Page so First Name and Last Name display respectively.

like first Name:Jean-Louis
Last Name urant.
That's it.
Hope you all understand my situtation.
how to store into the xml file...means what is the structure.please give me some solution.
Thank you,
Kaleeswaran

[Muhammad Saifuddin]

here is a link for traverse xml data using javascript. hope it helps you to move forward.

[Muhammad Saifuddin]

Originally posted by Anil Verghese:
how to store into the xml file...

is this possible to write data into xml file through javascript?