validate a date using a regular expression

[samuelberthelot]

Hello,
I would like to validate a date in a textbox on the onChange event.
The date must be in the format 01/01/2007

I would like to use a regular expression to validate it but I'm not
very familiar with them. How can I do it ?

Thanks

 

[reflex]

(e-mail address removed) napsal:

Hello,
I would like to validate a date in a textbox on the onChange event.
The date must be in the format 01/01/2007

I would like to use a regular expression to validate it but I'm not
very familiar with them. How can I do it ?

Thanks

var regExp = /^\d{2}\/\d{2}\/\d{4}$/;
var date = "01/01/2007";

if(regExp.test(date)) {
alert('yep its correct date');
} else {
alert('this is not correct date');
}

This regexp will only test format not date. (correct date will be
99/99/9999).

 

[samuelberthelot]

thanks you ! it works.

 

[Dr J R Stockton]

In comp.lang.javascript message <[email protected]
oglegroups.com>, Tue, 12 Jun 2007 10:11:46,
(e-mail address removed) posted:

I would like to validate a date in a textbox on the onChange event.
The date must be in the format 01/01/2007

That's a really silly format. It could represent, in that order, 1st
Jan 2007 or Jan 1st 2007. Now consider the following day ... . Numeric
dates should be ISO 8601.

I would like to use a regular expression to validate it but I'm not
very familiar with them. How can I do it ?

You can easily validate the pattern thus, but not *easily* the date
itself. However, validating the date itself after a pattern test is
trivial, once the principle is realised. See below.

It's a good idea to read the newsgroup c.l.j and its FAQ. See below.