Get('XML') doesn't work, but get() does in javascript - CASCADING LOVs

Question

I'm trying to get cascading LOVs working in Apex 3.1.0 in Oracle 11g. When I call get.get('XML') it returns null in firefox and empty string in IE6. If I change it to call get.get() then it returns the XML as a string into Javascript.
The Application process is getting called in both scenarios as i've put PL/SQL logging to disk in order to prove it. The XML being returned is very basic so i'm sure it's not a problem with formatting. I'm not getting any exceptions thrown in javascript either.
Is it possible to use get.get() and then convert the text into an XML object which is returned as per get.get('XML') which at least will allow me to get something working ?
thanks
<script language="JavaScript" type="text/javascript">
function getBusinessFieldJS(pThis, pSelect)
alert('getBusinessFieldJS');
try
var l_Return = null;
var l_Select = html_GetElement(pSelect);
var get = new htmldb_Get(null, html_GetElement('pFlowId').value, 'APPLICATION_PROCESS=GET_DATA_FIELDS_XML', 0);
/*get.add('F120_GETBUSINESSFIELD_ITEM',pThis.value);*/
gReturn = get.get('XML');
alert('gReturn=' + gReturn);
alert('gReturn.value=' + gReturn.value);
if (gReturn == null)
alert('gReturn is null');
if(gReturn && l_Select)
var l_Count = gReturn.getElementsByTagName("option").length;
alert('l_count='+l_Count);
l_Select.length = 0;
for(var i=0;i<l_Count;i++)
var l_Opt_Xml = gReturn.getElementsByTagName("option")+;+
+ appendToSelect(l_Select, l_Opt_Xml.getAttribute('value'),+
+ l_Opt_Xml.firstChild.nodeValue)+
+ }+
+ }+
+
get = null;+
+ }+
+ catch (e)+
+ {+
+ alert('Exception : ' + e);+
+
}+
+}+

Answer 1

Hi,
I've been trying to replicate your problem here: [http://apex.oracle.com/pls/otn/f?p=37055:1]
My application process is:
BEGIN
OWA_UTIL.mime_header ('text/xml', FALSE);
HTP.p('Cache-Control: no-cache');
HTP.p('Pragma: no-cache');
OWA_UTIL.http_header_close;
HTP.prn('<select>');
HTP.prn('<option value="-1">Please Select</option>');
HTP.prn('</select>');
END;(Just copied from your post and XML changed to xml, otherwise untouched)
And my page has a simple HTML region with the source of:
&lt;div id="XMLOUTPUT" style="border:1px solid blue; width:200px; height:200px;"&gt;&lt;/div&gt;
&lt;div id="XMLOUTPUT2" style="border:1px solid blue; width:200px; height:200px;"&gt;&lt;/div&gt;
&lt;script type="text/javascript"&gt;
function getMyXML()
var l_Return = null;
var get = new htmldb_Get(null, html_GetElement('pFlowId').value, 'APPLICATION_PROCESS=RETURN_XML', 0);
gReturn = get.get('XML');
var d = html_GetElement('XMLOUTPUT');
d.innerHTML = gReturn;
var d2 = html_GetElement('XMLOUTPUT2');
d2.innerHTML = get.get();
var s = gReturn.getElementsByTagName("select");
alert(s.length);
&lt;/script&gt;
&lt;a href="javascript:getMyXML();"&gt;Click&lt;/a&gt;Click on Click at the bottom of the page. The first DIV gets the get.get('XML') object and the second one the get.get() and a popup message tells you how many "select" items are in the XML version.
As far as I can see, this works fine.
Andy