Spinning/loading image for ajax call

Hi,
Is there any way to display a spinning/loading image (the usual one that you see on many Ajax Websites) before getting the result in the following ajax call?
Thanks.
Andy
<script type="text/javascript">
function getUserList() {
var ajaxRequest = new htmldb_Get(null,&APP_ID.,'APPLICATION_PROCESS=getUsers',0);
ajaxRequest.add('P2_LAST_NAME',html_GetElement('P2_LAST_NAME').value);
ajaxRequest.add('P2_FIRST_NAME',html_GetElement('P2_FIRST_NAME').value);
ajaxResult = ajaxRequest.get();
if (ajaxResult)
{html_GetElement('UserListDiv').innerHTML = ajaxResult}
else
{html_GetElement('UserListDiv').innerHTML = 'null'}
ajaxRequest = null;
</script>

the CPU time is on the DB/application server site.
here are the codes (on page 40):
1.) page HTML header:
<script language="JavaScript" type="text/javascript">

</script>
2.) on apge footer text:
<div id="AjaxLoading" style="display:none;">..Loading..
<img src="#IMAGE_PREFIX#/processing3.gif" /></div>
3.) onDemand process:
declare
l_counter number;
l_o_name varchar2(2000);
begin
htp.prn('<body>'||chr(10));
for i in 1..5000 loop
htp.prn('<payload id="test'||i||'">'||i||':'||v('P40_TEMP_ITEM')||'</payload>'||chr(10));
end loop;
htp.prn('</body>');
end;
4.) a html region is created with three items : p40_temp_item, p40_test, and p40_text_drop. a SEND button created in the region with URL target "javascript:f_TestOnDemand();"
so the content from P40_TEST does go to P40_TEXT_DROP (with process wrapped info) and the "loading..." is gone also, if I input the text in the P40_TEST field and click "Send" again, it still works, but I can not move to other pages under the same tab set, and at this moment, the CPU is go very higher by the process.
I can not see any leak around these code. it should go back to normal after "Send".
Thank you.
Jim

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