i try to pare two timestamps like this:

var nowDate = new Date();
var givenDate = new Date(parseInt(year), parseInt(month), parseInt(day), parseInt(hour), parseInt(minute), 0);
var nd_timestamp = nowDate.getTime();
var gd_timestamp = givenDate.getTime();

if (nd_timestamp > gd_timestamp) {
    alert("yes");   
}

But it is not working properly. If i look at the nd_timestamp and gd_timestamp everything looks fine, but the if-clause is not working. If i remove the parseInt(year)... and enter Date(2012, 04, 20, 0, 0, 0) the if-clause is working.

The variables year, month etc. es through a function, but if i debug it with alert(year) etc. everything is fine. The given date through the form is smaller than the actual date.

Does anybody know why it is not working with variables?

Thanks!

i try to pare two timestamps like this:

var nowDate = new Date();
var givenDate = new Date(parseInt(year), parseInt(month), parseInt(day), parseInt(hour), parseInt(minute), 0);
var nd_timestamp = nowDate.getTime();
var gd_timestamp = givenDate.getTime();

if (nd_timestamp > gd_timestamp) {
    alert("yes");   
}

But it is not working properly. If i look at the nd_timestamp and gd_timestamp everything looks fine, but the if-clause is not working. If i remove the parseInt(year)... and enter Date(2012, 04, 20, 0, 0, 0) the if-clause is working.

The variables year, month etc. es through a function, but if i debug it with alert(year) etc. everything is fine. The given date through the form is smaller than the actual date.

Does anybody know why it is not working with variables?

Thanks!

• javascript

• 1 You know that JavaScript Date objects expect a month value from 0 to 11, and not 1 to 12, right? – Pointy Commented Jun 30, 2012 at 14:19
• 1 Also your parseint calls should look like parseInt(month, 10) - if you don't do that you'll get weird results from "08" and "09". – Pointy Commented Jun 30, 2012 at 14:20
• Hello, thanks. I use now parseInt(var, 10) and for the month i do: parseInt(month-1,10). That seems to be correct. – Torben Commented Jun 30, 2012 at 14:26
• It should be parseInt(month, 10) - 1, though if the month is really a valid number just month - 1 should work - JavaScript will convert the string to a number because of the - operator so the call to parseInt() in that case is superfluous. Of course, you may want to check for validity on those field values. – Pointy Commented Jun 30, 2012 at 14:27
• You don't need to use parseInt, strings are fine. And month - 1 will return a Number provided month is string that converts to a number. e.g. given y='2012', m='06', d='05' then new Date(y,--m,d) will return the correct date. – RobG Commented Jun 30, 2012 at 14:28

2 Answers 2

You should check the values you pass to the Date constructor for validity, which includes explicitly specifying 10 as the second parameter to all of your parseInt calls to avoid nasty surprises.

Regarding the second parameter, the documentation says

While this parameter is optional, always specify it to eliminate reader confusion and to guarantee predictable behavior. Different implementations produce different results when a radix is not specified.

You have to take 1 from Month because for some reason it is zero based, unlike the others.