Populating Text Fields from XML Based Drop Down

Question

Hello,
I'm new to the Adobe Livecycle I have been challenged to make a PDF form that pulls information from an XML file.
I have been able to get the from to read the XML file and I have successfully created a dynamic pull down, but what I am having a problem with is that when an item is selected in the dropdown I want it to pull other information stored in the XML file.
<user>
  <csrName>MyName</csrName>
  <csrExt>123</csrExt>
  <csrFax>123-123-1234</csrFax>
</user>
<user>
  <csrName>MyName</csrName>
  <csrExt>321</csrExt>
  <csrFax>999-234-1322</csrFax>
</user>
My pulldown reads each csrName and I can select whom I want, but how do I get <csrExt> and <csrFax> to pull over for the correct <csrName>? I figured it needs to be done by some code during the "Change Event" but I have not figured out what code is needed.
Any help is greatly appreciated, if anymore information is needed just let me know and I'll share what I got.
Thanks
Derrick

Answer 1

Thanks for the reply.
Right now I'm starting with a blank form and once I get my head wrapped around this then I was going to modify what is already in use.
I'm attaching my scheme and xml file.
Thanks!
Derrick
I get an error when trying to upload my schema. I am pasting the content of the file here. I call it proofout.xsd
<?xml version="1.0" encoding="utf-8"?>
<xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="userList" type="UserList" />
<xs:complexType name="User">
  <xs:sequence>
   <xs:element name="csrName" type="xs:string" />
   <xs:element name="csrExt" type="xs:int" />
   <xs:element name="csrFax" type="xs:string" />
   </xs:sequence>
   </xs:complexType>
   <xs:complexType name="UserList">
   <xs:sequence maxOccurs="unbounded">
    <xs:element name="user" type="User" />
    </xs:sequence>
    </xs:complexType>
    </xs:schema>