Date Comparsion Please help

Question

Hi All:
I am using a javascript for checking the date comparision while testing i found this error and this is serious to me
date comparision works fine with the same month the probem wht i am facing is
eg start date 31-jan-2008 and end date is 24-feb-2008 there is no error is get
if start date is 24-jan-2008 and end date is 14-feb-2009 it through me a alter msg saying start date is greater then end date
there is some mistake in the script i beleve please suggest and help me out how to fix this problem
the script wht i am using is this
<script type="text/javascript">
function checkdates_baseline(pStartDateItem,pEndDateItem)
var sdate = document.getElementById(pStartDateItem).value;
var edate = document.getElementById(pEndDateItem).value;
var amonths = new Array('JAN','FEB','MAR','APR','MAY','JUN','JUL','AUG','SEP','OCT','NOV','DEC');
var start_date = new Date();
var end_date = new Date();
var start_month = sdate.substring(3,6);
var end_month = edate.substring(3,6);
var nstart_month = 0;
var nend_month = 0;
for(i=0;i<12;i++)
if(amonths == start_month)
nstart_month = i;
if(amonths == end_month)
nstart_month = i;
start_date.setFullYear(sdate.substring(6,10),Number(sdate.substring(3,5))-1,sdate.substring(0,2));
end_date.setFullYear(edate.substring(6,10),Number(edate.substring(3,5))-1,edate.substring(0,2));
var result = (end_date - start_date);
if( result < 0)
alert('The End date must be after the Start Date');
</script>
thanks
sudhir

Answer 1

But wht i am using is apex collection date picker which is of the format
dd-mon-yyyy this is the default format in it
i think there is no option available to make this using pl.sql process for validating this
the code which i posted before it is comparing with the days but month it is not happening i have posted the javascript code above works fine need to know where the problem in the code
or is there any other way in doing this i am not using a date picker item i am using
select
HTMLDB_ITEM.DATE_POPUP(1,rownum,,'dd-mon-yyyy') start_date
HTMLDB_ITEM.DATE_POPUP(2,rownum,,'dd-mon-yyyy') end_date
from dual
Sorry i wont repeate this next posting twise
thanks
sudhir