XSL for searching a NodeList for a Node or Nodes

Hi

I am using XSL and MSXML 4 to do some reports. I have a main body of XSL which selects from an XML tree all employees who belong to a particular department which is a list being looped over already

<xsl:for-each select="mycomp:getFilteredEmployeeRecords(//employee[./@department = $deptName])">

Here, I am passing the result of "all employees in the current department" to a MSXSL:SCRIPT function where I want to filter the node list even more and return it. Let's say I want all employees called John in the current department passed in.

My problem is that nodeList is a DOMNodeList and does not have what I need to select another nodeList from it...i.e Node's selectNodes. If I could do that I would use for example

function getEmployeeRecords(nodeList) {
return nodeList.selectNodes("/employee[@name='John']");
}

The problem is that nodeList is a list of EMPLOYEE.

How can I return a nodeList from my function which is all EMPLOYEE nodes in nodeList with name = John?

Your mileage may vary, but with this xml:
this xpath: //employee[department="Shipping"][name="John"] selects the John in Shipping.