Displaying loading busy popup when performing long task.

Question

Dear All,
I am refering sample #27 on http://www.oracle.com/technetwork/developer-tools/adf/learnmore/index-101235.html as i came across the thread Re: Cursor busy state
But the solution is not working in my scenario following is my code.
JAVASCRIPT
function enforcePreventUserInput(evt) {
var popTask = AdfPage.PAGE.findComponentByAbsoluteId('popTask');
if (popup != null) {
AdfPage.PAGE.addBusyStateListener(popTask, handleBusyState);
evt.preventUserInput();
//JavaScript call back handler
function handleBusyState(evt) {
var popTask = AdfPage.PAGE.findComponentByAbsoluteId('popTask');
if (popTask != null) {
if (evt.isBusy()) {
popTask.show();
else {
popTask.hide();
AdfPage.PAGE.removeBusyStateListener(popTask, handleBusyState);
<af:selectOneChoice required="#{bindings.EMAIL_TEMPLATE_LOV_VO11.hints.mandatory}"
shortDesc="#{bindings.EMAIL_TEMPLATE_LOV_VO11.hints.tooltip}"
id="emailTemplate" simple="true"
valueChangeListener="#{backingBeanScope.generate_backing.templateSelected}"
autoSubmit="true"
valuePassThru="true">
<af:clientListener method="enforcePreventUserInput" type="valueChange"/>
<f:selectItem id="select" itemLabel="<-Select->"
itemValue="-1"/>
<af:forEach var="row"
items="#{bindings.EMAIL_TEMPLATE_LOV_VO1Iterator.allRowsInRange}">
<f:selectItem itemValue="#{row.attributeValues[0]}"
itemLabel="#{row.attributeValues[1]}"/>
</af:forEach>
</af:selectOneChoice>
<af:popup id="popTask" contentDelivery="immediate">
<af:dialog id="d2" type="none" title="Please wait ..."
closeIconVisible="false">
<af:panelGroupLayout id="pgl1" layout="vertical">
<af:image source="/Images/oralogo_small.gif" id="i1"/>
<af:image source="/Images/pleasewait.gif" id="i2"
inlineStyle="width:214px;"/>
<af:outputText value="... please wait" id="ot11"/>
</af:panelGroupLayout>
</af:dialog>
</af:popup>
Can any one please point me out where i am going wrong ?..
-Thanks

Answer 1

Do did not mention what went wrong or is not working.
Have you tried the sample from the code corner page?
Does this sample work? JDev version?
Timo