There's a number of solutions:

https://goo.gl/KcSFTq

Personally. I'd use the jQuery function.

I'm much more interested in what "CLASSIFICATION: UNCLASSIFIED" means, is
that appended and prepended to every .mil email?

On Thu, Jan 18, 2018 at 8:51 AM, Mark Pernotto <[log in to unmask]>
wrote:

> Without any more information, you could do something along these lines:
>
> var string  = '99999-0123';
> var newstring = string.slice(0,-5);
>
> But that won't take into account if the first 5 numbers are, in fact,
> numeric.  Should the numeric check occur prior to the string slicing?
>
> Mark
>
>
> On Thu, Jan 18, 2018 at 8:47 AM, Zhu, Kaile NAF USARMY IMCOM HQ (US) <
> [log in to unmask]> wrote:
>
> > CLASSIFICATION: UNCLASSIFIED
> >
> > Anybody can help me with such JavaScript code that can chop the ending
> > portion of the string - last 5 characters - verifying if it is all
> numbers
> > (zip code)?
> >
> > Thanks.
> >
> > Kelly Zhu
> >
> > CLASSIFICATION: UNCLASSIFIED
> >
>