I am calling a jsp within the loadNodeData function to perform a a
query and return a result containing an array of strings. How do I
get the query results into oResults and ResultSet below? Which
script should I include for ResultSet?

function loadNodeData(node, fnLoadComplete) {

var nodeLabel = encodeURI(node.label);

//prepare URL for XHR request:
var sUrl = "/orderpkg/hi.jsp?orderid="+nodeLabel+"&doc=COI";

//prepare our callback object
var callback = {
success: function(oResponse) {
var oResults = eval("(" + oResponse.responseText + ")");
if((oResults.ResultSet.Result) &&(oResults.ResultSet.Result.length))
{
success: function(oResponse) {
if(YAHOO.lang.isArray(oResponse.responseText)) {
----
}
}