how to search xml file data based on the given keyword from html form?

[nicemothi]

hi,

i'm new to XML. I have this problem regarding searching within a XML file.
the idea is that my search will be based on the keyword entered
in by the user from a HTML form. the keyword is then used to search all
the nodes and child nodes within a XML file. once the match
is found, i will have to display the results.

But i don't know how to do so - especially the part of searching xml file.

Can
anyone help me in this? Your help is much appreciated.