Not able to display javascript alert message from within a pl/sql block

Question

Hello,
Can anyone please help me out with this issue. I wanted to display an javascript alert message from within a pl/sql block for an update button. Below is sample code which i am using. P1_ITEM is my hidden item on the report.
begin
if :P1_ITEM IS NOT NULL then
HTP.p ('<script type="text/javascript">');
HTP.p ('alert(''Please complete the item which is already assigned to you!'');');
HTP.p ('</script>');
end if;
end;
and I have made this code to be executed conditionally when request = Expression1
Expression1: SUBMIT
The thing is I am not able to display an alert message when the update button is clicked.
Can anyone please help me with this one.
Thanks,
Orton

Answer 1

varad but I also have an update statement within that block for the update button something like this i want to achieve.
begin
if :P1_ITEM IS NULL THEN
update sample_tbl
set col1 =:APP_USER,
col2 = 'Y'
where pk_col = ---;
commit;
HTP.p ('<script type="text/javascript">');
HTP.p ('alert(''Successfully assigned an item!'');');
HTP.p ('</script>');
end if;
if :P1_ITEM IS NOT NULL then
HTP.p ('<script type="text/javascript">');
HTP.p ('alert(''Please complete the item which is already assigned to you!'');');
HTP.p ('</script>');
end if;
end;
thanks,
Orton