I have some code for validating date below:

function validateForm() {

var errFound = 0;       

//var patt_date = new RegExp(^((((19|20)(([02468][048])|([13579][26]))-02-29))|((20[0-9][0-9])|(19[0-9][0-9]))-((((0[1-9])|(1[0-2]))-((0[1-9])|(1d)|(2[0-8])))|((((0[13578])|(1[02]))-31)|(((0[1,3-9])|(1[0-2]))-(29|30)))))$);

var patt_date = new RegExp(^[0-9]{4}-(((0[13578]|(10|12))-(0[1-9]|[1-2][0-9]|3[0-1]))|(02-(0[1-9]|[1-2][0-9]))|((0[469]|11)-(0[1-9]|[1-2][0-9]|30)))$);

if (patt_date.test(document.getElementById(datefrom).value) == false){errFound = errFound + 1;document.getElementById(datefrom).className = error;}



if (errFound > 0)

    alert('Please correct red colored field!');

else

    return true;

return false;   

}

Above code should work with YYYY-MM-DD format, but fail to validate date such as 2009-02-29

The commented code should work (//var patt_date = new RegExp...), it can catch 2009-02-29,
but it ruin the validation when i put invalid data and try to correct it, it keeps complain there something wrong with form value after i had correct them (especially on form with multiple input)

Maybe someone can fix the current regex?

---

Edited, what i want just a simple replacement for above regexp, mean a new regexp pattern not the whole new method to validate date

And for reference, i simply grab the regexp pattern from:

http://www.regexlib.com/REDetails.aspx?regexp_id=694 and

http://www.regexlib.com/REDetails.aspx?regexp_id=933

Tested with 2009-02-29, 1st link work & 2nd not. Again the problem was only the 2nd regexp didn't detect value 2009-02-29 as invalid while 1st can (but it ruin my code? so it's must be there something wrong with it).

Thanks,

Dels