Cascading Select List Doesn't work properly

Question

I am trying to use Cascading Select List in My Application. It works for the first time when I run the page afterwards when I try to open the same page in a different window it doesn't work afterwards it doesn't work at all.My code is as follows.
1) Application Process with name getDet
DECLARE
lv_os_List varchar2(32000) := '';
platform varchar2(50);
err_code number;
err_msg varchar2(200);
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 || '">' || '- All OS -' || '</option>');
select platform into platform from platform where platformid =:P139_PLATFORM;
if platform = 'Sun SPARC' then
for i in (select os , osid from ostype where os like '%Sola%' order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
ELSIF (platform ='Linux (x86 & x86-64)') then
for i in (select os ,osid from ostype where os like '%Linux%' or os like '%RH%' or os like '%SLES%' or os like '%OEL%' order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
ELSIF (platform ='TRU64') then
for i in (select os ,osid from ostype where os like '%Tru64%' order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
ELSIF (platform ='Windows') then
for i in (select os ,osid from ostype where os like '%Windows%' order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
ELSIF (platform ='IBM Linux on Power') then
for i in (select os ,osid from ostype where os like '%Linux%' or os like '%RH%' or os like '%SLES%' or os like '%OEL%' order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
ELSIF (platform ='IBM System z') then
for i in (select os ,osid from ostype where os like '%Linux%' or os like '%RH%' or os like '%SLES%' or os like '%OEL%' order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
ELSIF (platform like 'HP%') then
for i in (select os ,osid from ostype where os like '%HP%' order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
ELSIF (platform ='Itanium') then
for i in (select os ,osid from ostype where os like '%HP%' or (os like '%Windows%' and osid <> 201) or os like '%Linux%64%' or os like '%RH%64%'
order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
ELSIF (platform ='AIX') then
for i in (select os ,osid from ostype where os like '%AIX%' order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
ELSE
for i in (select os ,osid from ostype order by os) loop
htp.prn('<option value="' || i.osid || '">' || i.os || '</option>');
end loop;
END IF;
htp.prn('</select>');
EXCEPTION
WHEN OTHERS THEN
err_code := SQLCODE;
err_msg := substr(SQLERRM, 1, 200);
INSERT INTO ERROR_TABLE (error_number, error_message)
VALUES (err_code, err_msg);
END;
2) Application Item
CASCADING_SELECTLIST_ITEM_1
3) In the Footer of the region which contains the items the following Java Script
<script>
function get_select_list_xml(pThis,pSelect){
var l_Return = null;
var l_Select = html_GetElement(pSelect);
var get = new htmldb_Get(null,html_GetElement('pFlowId').value,
'APPLICATION_PROCESS=getDet',0);
get.add('CASCADING_SELECTLIST_ITEM_1',pThis.value);
gReturn = get.get('XML');
if(gReturn && l_Select){
var l_Count = gReturn.getElementsByTagName("option").length;
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;
function appendToSelect(pSelect, pValue, pContent) {
var l_Opt = document.createElement("option");
l_Opt.value = pValue;
if(document.all){
pSelect.options.add(l_Opt);
l_Opt.innerText = pContent;
}else{
l_Opt.appendChild(document.createTextNode(pContent));
pSelect.appendChild(l_Opt);
</script>
<script>
get_select_list_xml($x('P139_PLATFORM'),'P139_OS');
</script>
For the first Select list form element properties
onchange="get_select_list_xml(this,'P139_OS')"
Please let me know what change I need to make in the code.

Answer 1

Vikas,
Is your page 0 a public page or it requires authentication? I remember having the same
problem a while ago.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/apex/f?p=107:7
http://htmldb.oracle.com/pls/otn/f?p=31517:1
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