javascript regular expression error

[T. Pastrana]

It works here but it's not fool proof. You didn't say why it isn't working
for you. It could be that your putting in odd characters in the field or it
could be the way your actually calling the function.

A more accurate expression ( if only numbers are truly allowed ) would be
this one.

/^[0-9]*$/

....This will look for numbers only.

Then in the if statement place an explanation mark before the condition
stating that it is ( if not true ) instead of ( if it is true )...in other
words ... if there are no numbers, or if there is anything else than a
number even if some numbers are present.

if (!field.value.match(/^[0-9]*$/)){

--
..Trent Pastrana
[url]www.fourlevel.com[/url]




"Dwayne Epps" <dwayneepps@centurytel.net> wrote in message
news:bevat4$h2$1@forums.macromedia.com...

> I am trying to create a function that checks for only numbers within a

text

> field. Here is the function I'm using:
>
> function noLetters(field) {
> if (field.value.match(/^[a-zA-Z]*$/)) {
> alert('This field can only contain numbers.');
> field.focus();
> field.select();
> return false;
> }
> return true;
> }
>
> It is not working and I believe the error in the syntax is within the

line:

> if (field.value.match(/^[a-zA-Z]*$/))
>
> If anyone can identify the problem with the syntax it would be

appreciated?

> Thanks in advance.
> -D-
>
>

[Dwayne Epps]

Hi Trent,
That worked great! I appreciate the help. If I could ask one more
question. I know there is a way to include individual characters within a
regular expression. For example, the following statement will find any
character
that doesn't match with all lowercase letters, uppercase letters and digits.
How can I also add individual characters to the expression? I would like to
include the whitespace character for a blank space and some other additional
characters like the comma sign, etc. within the expression.

if (!field.value.match(/^[a-zA-Z-0-9]*$/))

Thanks again for your help!
-D-




"T. Pastrana" <tpastrana@NOSPAMMfourlevel.com> wrote in message
news:bevjt9$c9d$1@forums.macromedia.com...

> It works here but it's not fool proof. You didn't say why it isn't working
> for you. It could be that your putting in odd characters in the field or

it

> could be the way your actually calling the function.
>
> A more accurate expression ( if only numbers are truly allowed ) would be
> this one.
>
> /^[0-9]*$/
>
> ...This will look for numbers only.
>
> Then in the if statement place an explanation mark before the condition
> stating that it is ( if not true ) instead of ( if it is true )...in other
> words ... if there are no numbers, or if there is anything else than a
> number even if some numbers are present.
>
> if (!field.value.match(/^[0-9]*$/)){
>
> --
> ..Trent Pastrana
> [url]www.fourlevel.com[/url]
>
>
>
>
> "Dwayne Epps" <dwayneepps@centurytel.net> wrote in message
> news:bevat4$h2$1@forums.macromedia.com...

> > I am trying to create a function that checks for only numbers within a

> text

> > field. Here is the function I'm using:
> >
> > function noLetters(field) {
> > if (field.value.match(/^[a-zA-Z]*$/)) {
> > alert('This field can only contain numbers.');
> > field.focus();
> > field.select();
> > return false;
> > }
> > return true;
> > }
> >
> > It is not working and I believe the error in the syntax is within the

> line:

> > if (field.value.match(/^[a-zA-Z]*$/))
> >
> > If anyone can identify the problem with the syntax it would be

> appreciated?

> > Thanks in advance.
> > -D-
> >
> >

>
>

[T. Pastrana]

Dwayne,

Well, you can add the characters you want to the character set you have
defined in the expression. The current set contains numbers only. Just add
the characters you wish to allow at the end.

For example.. what was previously this ... [0-9]

now become this... [0-9\s,.]

The \s allows for spaces.
The , allows for commas.
The . allows for peroids.
etc...

So if you wanted to add say a colon to the equation above just add it in
there at the end.

and it would look like this... [0-9\s,.:]


--
..Trent Pastrana
[url]www.fourlevel.com[/url]




"Dwayne Epps" <dwayneepps@centurytel.net> wrote in message
news:bf26ju$mse$1@forums.macromedia.com...

> Hi Trent,
> That worked great! I appreciate the help. If I could ask one more
> question. I know there is a way to include individual characters within a
> regular expression. For example, the following statement will find any
> character
> that doesn't match with all lowercase letters, uppercase letters and

digits.

> How can I also add individual characters to the expression? I would like

to

> include the whitespace character for a blank space and some other

additional

> characters like the comma sign, etc. within the expression.
>
> if (!field.value.match(/^[a-zA-Z-0-9]*$/))
>
> Thanks again for your help!
> -D-

[T. Pastrana]

Good one... ;-)


--
..Trent Pastrana
[url]www.fourlevel.com[/url]




"David Powers" <me@thisisntmyaddress.com> wrote in message
news:bf3876$8ov$1@forums.macromedia.com...

> T. Pastrana wrote:
> ::
> :: /^[0-9]*$/
> ::
> :: ...This will look for numbers only.
>
> It will also match a blank field. The * means match zero or more. To

ensure

> at least one number is included /^[0-9]+$/
>
>
> --
> David Powers
> *******************************************
> No-nonsense reviews of computer books
> [url]http://japan-interface.co.uk/webdesign/books.html[/url]
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> *******************************************
>
>