I've loved using jQuery these past few months, but I'm really pulling 
my hair our here. 

The following is the "endpoint" asp code that gets called to populate 
my treeview:

<% 
rootid = request.querystring("rootid") 
json = "" 
set Conn = server.CreateObject("ADODB.Connection") 
Conn.Open strProvider 
if rootid = "source" then 
        json = "[" 
        set RS = Server.CreateObject("ADODB.RecordSet") 
        Sql = "select categoryid,categoryname,(select count(*) from 
tblcategories where parentid = c1.categoryid) ChildCount from 
tblcategories c1 where parentid = 0" 
        session("errorsql") = sql 
        set Cmd = Server.CreateObject("ADODB.Command") 
        Cmd.CommandText = Sql 
        Cmd.ActiveConnection = Conn 
        rs.open Cmd 
        if not RS.EOF then 
                GotRows = "y" 
                arrResultSet = RS.GetRows() 
                numRows = ubound(arrResultSet,2) 
                For i = 0 to numRows 
                        categoryid = arrResultSet(0,i) 
                        categoryname = arrResultSet(1,i) 
                        childcount = cint(arrResultSet(2,i)) 
                        json = json & "{'text': '" & categoryname & "','id':'" & categoryid 
& "'" 
                        if childcount > 0 then 
                                json = json & ", 'hasChildren':true" 
                        end if 
                        json = json & "}" 
                        if i < numRows  then 
                                json = json & "," 
                        end if 
                Next 
        else 
                GotRows = "n" 
                json = json & "{'text': 'No Categories have been created'}" 
        end if 
        json = json & "]" 
        RS.close 
elseif isnumeric(rootid) and rootid <> "" then 
        json = "[" 
        set RS = Server.CreateObject("ADODB.RecordSet") 
        Sql = "select categoryid,categoryname,(select count(*) from 
tblcategories where parentid = c1.categoryid) ChildCount from 
tblcategories c1 where parentid = ?" 
        session("errorsql") = sql 
        set Cmd = Server.CreateObject("ADODB.Command") 
        Cmd.Parameters.Append CreateIntParameter(Cmd, "rootid", rootid) 
        Cmd.CommandText = Sql 
        Cmd.ActiveConnection = Conn 
        rs.open Cmd 
        if not RS.EOF then 
                GotRows = "y" 
                arrResultSet = RS.GetRows() 
                numRows = ubound(arrResultSet,2) 
                For i = 0 to numRows 
                        categoryid = arrResultSet(0,i) 
                        categoryname = arrResultSet(1,i) 
                        childcount = cint(arrResultSet(2,i)) 
                        json = json & "{'text': '" & categoryname & "','id':'" & categoryid 
& "'" 
                        if childcount > 0 then 
                                json = json & ", 'hasChildren':true" 
                        end if 
                        json = json & "}" 
                        if i < numRows then 
                                json = json & "," 
                        end if 
                Next 
        else 
                GotRows = "n" 
        end if 
        json = json & "]" 
        RS.close 
end if 
set Cmd = nothing 
set RS=nothing 
conn.close 
set conn=nothing 
response.write json 
%> 

This code produces the following JSON string viewable when I hit the 
page directly with the ?rootid=source parameter: 

[{'text': 'Cat1.0','id':'1'},{'text': 'Cat1.1','id':'2', 
'hasChildren':true},{'text': 'Cat1.2','id':'3'}] 

Unless I've received a severe blow to the head, I recognize this as 
valid JSON and just what the treeview needs to produce a flat display 
of 3 nodes with the second having a '+' sign for expandability. 

Here's the frustrating part, when I past that string into the body of 
my asp page, comment out the response.write line, save, and run 
everything I get the simple tree that I'd expect.  When I remove the 
JSON string, and uncomment the response.write line, nothing happens. 

I've tried flushing the response object, ending the response object, 
clearing the response before writing to it, yet nothing seems to work. 

Please, please help!