dates

[wxdqz]

Hi...
i am new in javascript...
I am trying to validate the date of 2 edit boxes using yyyy/mm/dd. i am trying to execute the code below but something goes wrong.
Can please anyone tell me what is the problem???


in the form i wrote:
onSubmit="return dateformat(this);"

<script language="javascript">

function isValidDate(dateStr) {

var datePat = /^(\d{4})-?(\d{2})-?(\d{2})$/;
var matchArray = dateStr.match(datePat);
if (matchArray == null) {
alert("Please enter date as yyyy-mm-dd.");
return false;
}

year = matchArray[1];
month = matchArray[2];
day = matchArray[3];


if (month < 1 || month > 12) {
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) {
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;
}

function dateformat(dateform) {
date1 = new Date();
date2 = new Date();

if (isValidDate(dateform.firstedit.value) {
date1temp = new Date(dateform.firstedit.value );
}
else return false;
if (isValidDate(dateform.secondedit.value){
date2temp = new Date(dateform.secondedit.value );
}
else return false;
</script>

P.S. The code is not written by me ( pieces from here and there) but i am trying to execute it in order to learn.

Thanks in advance