question about whitespace

[Dwayne Epps]

I've created a function that checks form fields that only will have letters.
This is the script:

<script type="text/javascript" language="javas cript">
function validateString( field, msg, min, max) {
if (!min) { min = 1 }
if (!max) { max = 65535}
if (!field.value || field.value.len gth < min || field.value.max > max) {
alert(msg);
field.focus();
field.select();
return false;
}
return true;
}
</script>

How can I add code to this function that checks for whitespace...ex .
"\n\r\t"
I would also like to check for only letters in the fields and make sure no
numbers have been entered. Any help is appreciated. Thanks in advance.
-D-

[Richard Hockey]

Re: question about whitespace

Using regular expressions would be the easiest method:

/^[a-zA-z]+$/ only allow letters

<script type="text/validate">
function Validate()
{
// set pattern for text only
var textRE=/^[a-zA-z]+$/;

varTextObject1= document.forms['myform'].elements['mytextbox'];

// check contents of textbox 'mytextbox' in form 'myform' against pattern
if(!textRE.test (TextObject1.va lue)
{
alert('text field 1 can only accept text, not numbers or other
characters.');
TextObject1.foc us();
return false;
}
return true;
}
</script>

.......

<form name="myform" action="blap.ph p" method="get" onSubmit="retur n
Validate();">
<input type="text" name="mytextbox ">
<input type="submit" value="submit form">
</form>


for numbers only use /^[0-9]+$/
for mixed text and numbers, with spaces /^[0-9a-zA-Z\s]+$/

"Dwayne Epps" <dwayneeppsNOSP AM@centurytel.n et> wrote in message
news:5TnQa.2599 $Jk5.1840087@fe ed2.centurytel. net...[color=blue]
> I've created a function that checks form fields that only will have[/color]
letters.[color=blue]
> This is the script:
>
> <script type="text/javascript" language="javas cript">
> function validateString( field, msg, min, max) {
> if (!min) { min = 1 }
> if (!max) { max = 65535}
> if (!field.value || field.value.len gth < min || field.value.max > max) {
> alert(msg);
> field.focus();
> field.select();
> return false;
> }
> return true;
> }
> </script>
>
> How can I add code to this function that checks for whitespace...ex .
> "\n\r\t"
> I would also like to check for only letters in the fields and make sure no
> numbers have been entered. Any help is appreciated. Thanks in advance.
> -D-
>
>[/color]

[edoardo]

Re: question about whitespace

"Dwayne Epps" <dwayneeppsNOSP AM@centurytel.n et> wrote in message news:<5TnQa.259 9$Jk5.1840087@f eed2.centurytel .net>...[color=blue]
> I've created a function that checks form fields that only will have letters.
> This is the script:
>
> <script type="text/javascript" language="javas cript">
> function validateString( field, msg, min, max) {
> if (!min) { min = 1 }
> if (!max) { max = 65535}
> if (!field.value || field.value.len gth < min || field.value.max > max) {
> alert(msg);
> field.focus();
> field.select();
> return false;
> }
> return true;
> }
> </script>
>
> How can I add code to this function that checks for whitespace...ex .
> "\n\r\t"
> I would also like to check for only letters in the fields and make sure no
> numbers have been entered. Any help is appreciated. Thanks in advance.
> -D-[/color]


Hi!
Well, did you know the regular expressions?!
Take a look!

funcion noNumbers( field ) {
if( field.value.mat ch( /\d/ ) {
alert('The string MUST not contain numbers!');
}
}

function removeSpaces( field ) {
field.value.rep lace( /\s/g, '' );
}

Here are some useful regular expressions:
[a-zA-Z] any letter
\d any number; same as [0-9]
\D any NOT number; same as [^0-9]
\w any alphanumeric character; same as [a-zA-Z-0-9_]
\W any NON-alphanumeric character; same as [^a-zA-Z0-9_]
\s any whitespace (tab, space, newline, etc...)
\S any NON-whitespace
\n newline
\t tab

Try search informations about regular expressions in JavaScript!

HTH
--
Edoardo
[http://edoardoontheweb.interfree.it/index.html]

[Dwayne Epps]

Re: question about whitespace

Hi Eduardo,
Thanks for the replying to my post. I appreciate the help. I was
looking over the regular expressions as you suggested and got the check for
whitespace and numbers to work, but I am having difficulty validating
against irregular characters, i.e., !#$%^&*()+=?).

I'm using the function listed below to validate the form fields. So, if I
wanted to validate against irregular characters, what regular expression
could I use to check for the following irregular characters: !#$%^&*()+=?).
Thanks again for your help! I'm pretty new with Javascript, so I really
appreciate the help on this.

function noNumbers(field ) {
if (field.value.ma tch(/\d/)) {
alert('This field can not contain numbers!');
field.focus();
field.select();
return false;
}
return true;
}

-D-


"edoardo" <edoardoonthewe b@interfree.it> wrote in message
news:85c9e683.0 307132330.1346e f1e@posting.goo gle.com...[color=blue]
> "Dwayne Epps" <dwayneeppsNOSP AM@centurytel.n et> wrote in message[/color]
news:<5TnQa.259 9$Jk5.1840087@f eed2.centurytel .net>...[color=blue][color=green]
> > I've created a function that checks form fields that only will have[/color][/color]
letters.[color=blue][color=green]
> > This is the script:
> >
> > <script type="text/javascript" language="javas cript">
> > function validateString( field, msg, min, max) {
> > if (!min) { min = 1 }
> > if (!max) { max = 65535}
> > if (!field.value || field.value.len gth < min || field.value.max > max) {
> > alert(msg);
> > field.focus();
> > field.select();
> > return false;
> > }
> > return true;
> > }
> > </script>
> >
> > How can I add code to this function that checks for whitespace...ex .
> > "\n\r\t"
> > I would also like to check for only letters in the fields and make sure[/color][/color]
no[color=blue][color=green]
> > numbers have been entered. Any help is appreciated. Thanks in advance.
> > -D-[/color]
>
>
> Hi!
> Well, did you know the regular expressions?!
> Take a look!
>
> funcion noNumbers( field ) {
> if( field.value.mat ch( /\d/ ) {
> alert('The string MUST not contain numbers!');
> }
> }
>
> function removeSpaces( field ) {
> field.value.rep lace( /\s/g, '' );
> }
>
> Here are some useful regular expressions:
> [a-zA-Z] any letter
> \d any number; same as [0-9]
> \D any NOT number; same as [^0-9]
> \w any alphanumeric character; same as [a-zA-Z-0-9_]
> \W any NON-alphanumeric character; same as [^a-zA-Z0-9_]
> \s any whitespace (tab, space, newline, etc...)
> \S any NON-whitespace
> \n newline
> \t tab
>
> Try search informations about regular expressions in JavaScript!
>
> HTH
> --
> Edoardo
> [http://edoardoontheweb.interfree.it/index.html][/color]

[edoardo]

Re: question about whitespace

"Dwayne Epps" <dwayneeppsNOSP AM@centurytel.n et> wrote in message news:<KDEQa.261 5$Jk5.1889374@f eed2.centurytel .net>...[color=blue]
> Hi Eduardo,
> Thanks for the replying to my post. I appreciate the help. I was
> looking over the regular expressions as you suggested and got the check for
> whitespace and numbers to work, but I am having difficulty validating
> against irregular characters, i.e., !#$%^&*()+=?).
>
> I'm using the function listed below to validate the form fields. So, if I
> wanted to validate against irregular characters, what regular expression
> could I use to check for the following irregular characters: !#$%^&*()+=?).
> Thanks again for your help! I'm pretty new with Javascript, so I really
> appreciate the help on this.
>
> function noNumbers(field ) {
> if (field.value.ma tch(/\d/)) {
> alert('This field can not contain numbers!');
> field.focus();
> field.select();
> return false;
> }
> return true;
> }
>
> -D-[/color]

Well, you can modify the function like this:

function noNumbers(field ) {
if( field.value.mat ch( /[!#$%^&*()+=?]/)\ ) ) {
alert('This field can not contain numbers!');
field.focus();
field.select();
return false;
}
return true;
}

The square brackets [] means that the matching returns 1 if at least a
character present between them is found.
You can add also \d if you want to match also numbers.

Bye
--
Edoardo
[http://edoardoontheweb.interfree.it/index.html]