| Author: ANIL PANDEY 05 Sep 2008 | Member Level: Diamond | Rating: Points: -20 |
hi,
use this Date validation function of java script....
function isValidDate(ctrl)
{
var dateStr = ctrl.value;
var datePat = /^(\d{1,2})(\/|-)(\d{1,2})\2(\d{2}|\d{4})$/;
var matchArray = dateStr.match(datePat); // is the format ok?
if (matchArray == null)
{
alert("Invalid date format. Please enter the date in the MM/DD/YY format (example: 1/15/08) or select a date by clicking the calendar icon.")
ctrl.focus();
return false;
}
month = matchArray[1]; // parse date into variables
day = matchArray[3];
year = matchArray[4];
if (month < 1 || month > 12)
{
// check month range
alert("Month must be between 1 and 12.");
return false;
}
if (day < 1 || day > 31)
{
alert("Day must be between 1 and 31.");
return false;
}
if ((month==4 || month==6 || month==9 || month==11) && day==31)
{
alert("Month "+month+" doesn't have 31 days!")
return false
}
if (month == 2)
{
// check for february 29th
var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
if (day>29 || (day==29 && !isleap))
{
alert("February " + year + " doesn't have " + day + " days!");
return false;
}
}
return true; // date is valid
}
}
function CheckDate()
{
var dt1 = new Date();
var dt2 = new Date();
dt1 = document.getElementById('txtFromDate').value;
dt2 = document.getElementById('txtTodate').value;
if(dt1 <= dt2)
{
return true;
}
else
{
alert('Start date must be smaller than End date.');
document.getElementById('txtTodate').value='';
document.getElementById('txtTodate').focus();
return false;
}
}
</script>
u can refer this code for validation
Regards
Anil pandey
|
| Author: Ramesh 05 Sep 2008 | Member Level: Silver | Rating:  Points: 2 |
Hi,
you can use the inbuilt vb function to perform the validation.
Dim diff As Integer = DateDiff(DateInterval.Day, frmDate, toDate)
if diff is negative, then the from date is greater than to date.
Thanks,
Ramesh
|