ASP/XML - SearchDOMTreeByName(Input)

[kx10]

USing ASP to parse XML - Is there a reasonably simple and dynamic way to search the DOM Tree by node names? I realise that I may need more than one parameter to identify none unique nodes, just wondered if anyone had a function I could have a look at, or some advice.

I have made a small start:

<%
'create the xml document object
set XMLDoc = server.createobject("Microsoft.XMLDOM")
'Specifies whether asynchronous download is permitted.
XMLDoc.async = false
'Load local test document -
XMLDoc.load(server.mappath("weathertest.xml"))
'Create a root Node from the XML document element
set rootNode = XMLDoc.documentElement

'Create a function to search the DOM tree by node name
Function SearchDOMTreeByName(Input)
'Walk the tree, I presume I need to set up a loop that identifies the level of children..
'and continues until it reaches the end leaves or finds the node with the required input name but don't know how
'**HELP!**
'Return the required text value
SearchDOMTreeByName=x.text
End Function

'test the function
response.Write(SearchDOMTreeByName("head"))
'Close the XML object
set XMLDoc=nothing
%>

I have actually already wrote a function that works for my application but would like something less hard wired as it only searches to a set level of nodes and refers to there positions in the tree, the call look like this:

GetNode(3,1,4,2,0)

Thanks for your time if you can help.