Difference between Two Date Should come into Text Item

Question

Dear All,
i want to get difference between two date into text Item :P36_C in On Change java script.
i have two Date Item :P36_A and :P36_B .i have extract these date value from table then difference comes into Text Field :P36_C.
Now i want if i change Date into Item :P36_A or Item :P36_B then Defference between two date Should Come into Item :P36_C .
So i have use Java Script Code to do this
<script>
  function diffdat(){
    function getVal(item){
   if($x(item).value != "")
     return parseFloat($x(item).value);
   else
     return 0;
    $x('P36_C').value =
getval((TO_DATE('P36_B', 'DD-MON-YYYY'))-
getval(TO_DATE('P36_A', 'DD-MON-YYYY')))+1;
</script>
i have put this into Item HTML Form Element Attributes 
onChange="javascript:diffdat();"it's not woring .
How to work that Code with dates.
Thanks

Answer 1

You can always create your own difference function based on your own criteria. You can modify this to suit your needs.
CREATE OR REPLACE FUNCTION CALC_OFFICE_DAYS(date1 DATE, date2 DATE)
RETURN NUMBER
IS
v_begin_date DATE := date1;
v_end_date DATE := date2;
v_office_start_time VARCHAR2(10) := '09:30 AM';
v_office_end_time VARCHAR2(10) := '06:30 PM';
v_comp_begin_time DATE;
v_comp_end_time DATE;
v_days PLS_INTEGER := 0;
v_hrs NUMBER := 0;
v_ttltm NUMBER;
BEGIN
select trunc(v_end_date) - trunc(v_begin_date)
into v_days
from dual;
select to_date(to_char(sysdate,'DD-MM-YYYY')||' '||to_char(v_begin_date,'HH24:MI'),'DD-MM-YYYY HH24:MI')
into v_comp_begin_time
from dual;
select to_date(to_char(sysdate,'DD-MM-YYYY')||' '||to_char(v_end_date,'HH24:MI'),'DD-MM-YYYY HH24:MI')
into v_comp_end_time
from dual;
select (v_comp_end_time - v_comp_begin_time)/24 into v_hrs from dual;
IF v_hrs > 4 then
v_ttltm := v_days + .5;
ELSE
v_ttltm := v_days;
END IF;
return v_ttltm;
END;
As has been noted, this question is best posted on the PL/SQL forum.