test alphanumeric string

[Matt]

I want the javascript to test an alphanumeric (a string contains
alphabet or numbers only) string. Should I write a regular expression?
What's the best way to do? please help. thanks

[kaeli]

Re: test alphanumeric string

In article <ba8a039e.04091 60817.7b0dfd76@ posting.google. com>,
jrefactors@hotm ail.com enlightened us with...[color=blue]
> I want the javascript to test an alphanumeric (a string contains
> alphabet or numbers only) string. Should I write a regular expression?
> What's the best way to do? please help. thanks
>[/color]

From my validation.js file...

function checkAlphanum(s trObject)
{
/* Returns true if the field has all alphanumeric characters, false if
not.
You must pass in a input (text) object, not the value. */
var re = /^[A-Za-z0-9]+$/;
if (!strObject || isBlank(strObje ct)) return false;
else return re.test(strObje ct.value);
}

function isBlank(strObje ct)
{
/* Returns true if the field is blank, false if not.
You must pass in an input (text) object (not the value) */
var re = /\S+/;

if (!strObject) return true;
return re.test(strObje ct.value));
}

HTH
--
--
~kaeli~
If that phone was up your a$$, maybe you could drive a
little better!

http://www.ipwebdesign.net/wildAtHeart

http://www.ipwebdesign.net/kaelisSpace

[Michael Winter]

Re: test alphanumeric string

On Thu, 16 Sep 2004 13:01:01 -0500, kaeli <tiny_one@NOSPA M.comcast.net>
wrote:

[snip]
[color=blue]
> function checkAlphanum(s trObject)
> {
> /* Returns true if the field has all alphanumeric characters,
> false if not.
> You must pass in a input (text) object, not the value. */
> var re = /^[A-Za-z0-9]+$/;
> if (!strObject || isBlank(strObje ct)) return false;
> else return re.test(strObje ct.value);
> }[/color]

Though the call to isBlank is redundant. As far as I can see, it would
only be of significance if checkAlphanum allowed whitespace but you wanted
to ensure that the value didn't contain only whitespace.

[snip]

Mike

--
Michael Winter
Replace ".invalid" with ".uk" to reply by e-mail.

[kaeli]

Re: test alphanumeric string

In article <MPG.1bb390d366 2847b98a134@nnt p.lucent.com>,
tiny_one@NOSPAM .comcast.net enlightened us with...[color=blue]
>
> function isBlank(strObje ct)
> {
> /* Returns true if the field is blank, false if not.
> You must pass in an input (text) object (not the value) */
> var re = /\S+/;
>
> if (!strObject) return true;
> return re.test(strObje ct.value));[/color]

Whoops, this should be
return !re.test(strObj ect.value));


--
--
~kaeli~
The Bermuda Triangle got tired of warm weather. It moved to
Finland. Now Santa Claus is missing.

http://www.ipwebdesign.net/wildAtHeart

http://www.ipwebdesign.net/kaelisSpace

[Dr John Stockton]

Re: test alphanumeric string

JRS: In article <ba8a039e.04091 60817.7b0dfd76@ posting.google. com>,
dated Thu, 16 Sep 2004 09:17:13, seen in news:comp.lang. javascript, Matt
<jrefactors@hot mail.com> posted :[color=blue]
>I want the javascript to test an alphanumeric (a string contains
>alphabet or numbers only) string. Should I write a regular expression?[/color]

Either that or copy one.
[color=blue]
>What's the best way to do? please help. thanks[/color]

<URL:http://www.merlyn.demo n.co.uk/js-valid.htm#VP>, x1, adjust {6,10}.

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