validation for yyyymmdd

[drams]

HI,

i am entering date in the format 'yyyymmdd' in the form.

once i click save button , it must validate the date .

any validation code ,please.

Thanks & Regards,
drams.

[forty2]

with Date object:

<script type="text/javascript">
	function isValidDate(year, month, date)
	{
		var flagDate = new Date(year, month, date);
		if (year != flagDate.getFullYear() || month != flagDate.getMonth() || date != flagDate.getDate())
		{
			return false;
		}
		return true;
	}
	alert(isValidDate(2000, 1, 29));
	alert(isValidDate(2001, 1, 28));
	alert(isValidDate(2001, 1, 29));
	alert(isValidDate(2007, 12, 1));
</script>

Without Date object:

<script type="text/javascript">
      function getDayInMonth(year, month)
      {
            if (month == 2)
            {
                  if (year % 4 == 0 && (year <= 1582 || (year % 100 != 0 || year % 400 == 0)))
                  {
                        return 29;
                  }
                  return 28;
            }
            if (month > 7) month ++;
            return (month % 2 == 0) ? 30 : 31;
      }
      
      
      function isValidDate(year, month, date)
      {
            for (i = 0; i < arguments.length; i++)
            {
                  if (isNaN(arguments[i]) || arguments[i] < 1) return false;
            }
            if (month > 12 || date > getDayInMonth(year, month)) return false;

            return true;
      }
      
      alert(isValidDate(2000, 2, 29));
      alert(isValidDate(2001, 4, 31));
      alert(isValidDate(2100, 2, 29));
      alert(isValidDate(1500, 2, 29));
</script>

[RMiranda]

forty2, there's one problem with your logic, javascript month in Date Object goes from 0(Jan)-11(Dec) extremely stupid i know, so it should be:
(also added parseInt for protection)

<script type="text/javascript">
function isValidDate(year, month, date)
{
var flagDate = new Date(parseInt(year, 10), parseInt(month, 10) - 1, parseInt(date, 10));
if (year != flagDate.getFullYear() || month != flagDate.getMonth()+1 || date != flagDate.getDate())
{
return false;
}
return true;
}
alert(isValidDate(2000, 1, 29));
alert(isValidDate(2001, 1, 28));
alert(isValidDate(2001, 1, 29));
alert(isValidDate(2007, 12, 1));
</script>

PS: You should edit your post because this is thread is the one that pops out first in a google search