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Re: Restrict a domain on Email Validation

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GarryJones wrote:
^^^^^^^^^^
There should be a space character between first and last name so as not to 
appear as a pseudonym and being subject to the respective filters.

> I am currently using this code to validate emailadresses on user forms.
> 
> function checkform ( form ){

Code conventions:

  function checkForm (form) {

or

  function checkForm (form)
  {

I prefer the latter in order to tell function expressions and function 
declarations apart.

>   if
>   (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/

Wrong, see RFC 5322 (and predecessors newer than RFC 822).

> .test(form.bokept.value))){

    .test(form.elements["bokept"].value))
  {

>     var answer = confirm("Invalid or incorrect email address
                                                              ^
Unterminated string literal ----------------------------------'

>       \n Click Cancel if you want to try again
>       \n Click OK if you don't have an email address
>       \n Click OK if our system does not allow your email adress
>       \n If you click OK we will insert a dummy email address for our
>       purposes")
>     if (answer){form.bokpap.checked = true;
>       form.bokept.value = 'missemail@mydomain.se';

You really do not want to include e-mail addresses (verbatim) in client-side 
code.  Also, do not use potentially existing domains for dummy values or 
examples.  Use the “invalid” top-level and “example” top-level and second-
level domains.  See RFC 2606.

>       return false ;

Convention is: No space before “;”.

>     } else {
>       form.bokept.focus();
>       form.bokept.value = '';

Proprietary referencing; avoid, see above.

>       return false ;

See above.

>     }
>   }
>  return true ;

See above.

> }
> 
> This has served me well since 2005.

Doubtful, as it does not compile due to syntax errors.
 
> Now I need to make a change.
> 
> I can no longer allow users to use email addresses from a certain domain.
> 
> How can I change the script to block all email addresses from @forbidden.*

  … 
  && !/@forbidden\.[^.]+$/.test(…)

As you can see here, it is not necessary to put the test() call in 
parentheses.

> (Where * can be org, com. co.uk, se ...... etc)
> 
> ?
> 
> Any help greatly appreciated.

Adaptation of the client-side code certainly helps to reduce unnecessary 
roundtrips.  But you must also check potential addresses server-side to 
fulfill the requirement.  (You should have done so before.)

-- 
PointedEars

Twitter: @PointedEars2
Please do not Cc: me. / Bitte keine Kopien per E-Mail.

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Thread

Restrict a domain on Email Validation GarryJones <morack@algonet.se> - 2013-04-11 10:33 -0700
  Re: Restrict a domain on Email Validation Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-11 20:40 +0200
    Re: Restrict a domain on Email Validation Stefan Weiss <krewecherl@gmail.com> - 2013-04-11 20:53 +0200
      Re: Restrict a domain on Email Validation Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-11 21:09 +0200
        Re: Restrict a domain on Email Validation Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-11 21:35 +0200
        Re: Restrict a domain on Email Validation Stefan Weiss <krewecherl@gmail.com> - 2013-04-11 21:49 +0200
          Re: Restrict a domain on Email Validation Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-11 22:04 +0200
            Re: Restrict a domain on Email Validation Stefan Weiss <krewecherl@gmail.com> - 2013-04-11 23:25 +0200
              Re: Restrict a domain on Email Validation Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-11 23:31 +0200
                Re: Restrict a domain on Email Validation Stefan Weiss <krewecherl@gmail.com> - 2013-04-12 00:23 +0200
                Re: Restrict a domain on Email Validation Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-12 00:42 +0200
                Re: Restrict a domain on Email Validation Stefan Weiss <krewecherl@gmail.com> - 2013-04-13 11:36 +0200
                Re: Restrict a domain on Email Validation Scott Sauyet <scott.sauyet@gmail.com> - 2013-04-20 13:30 -0700
    Re: Restrict a domain on Email Validation Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-04-12 00:51 +0200
  Re: Restrict a domain on Email Validation Dr J R Stockton <reply1300@merlyn.demon.co.uk.invalid> - 2013-04-12 19:36 +0100
    Re: Restrict a domain on Email Validation "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2013-04-13 10:40 +0200

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