form field validation

[Martin Nadoll]

Hello,

i have a few problems with form field validation:

First i have to check, wether a field is filled with 10 integer numbers.
Also allowed is " " and "-" but no letters, and the input of numbers must
be ten e.g.
"123456-78-9 0" should be allowed and also "12 34 67 67---56" also,
but not "123456789" . This should show a alert-message.("Pleas e enter 10
numbers").

Is there any help for me?
Thanks a lot,
Martin Nadoll

[Thomas Kemetmüller]

Re: form field validation

Hi!
I'm not that good in Javascript but maybe this could work:

say str is your string:

var str="0123 4-567 89";

for(i=0, ncount=0;i<str. length;i++)
{
if( str.charAt(i) >= '0' && str.charAt(i) <= '9' )
ncount = ncount + 1;
else
if( str.charAt(i) != ' ' && str.charAt(i) != '-')
alert("no letters allowed, except '-' and blank");
}
if(ncount != 10)
alert("please enter 10 numbers!");

i hope i helped you


----- Original Message -----
From: "Martin Nadoll" <martin@nadoll. de>
Newsgroups: comp.lang.javas cript
Sent: Thursday, October 30, 2003 5:35 PM
Subject: form field validation

[color=blue]
> Hello,
>
> i have a few problems with form field validation:
>
> First i have to check, wether a field is filled with 10 integer numbers.
> Also allowed is " " and "-" but no letters, and the input of numbers must
> be ten e.g.
> "123456-78-9 0" should be allowed and also "12 34 67 67---56" also,
> but not "123456789" . This should show a alert-message.("Pleas e enter 10
> numbers").
>
> Is there any help for me?
> Thanks a lot,
> Martin Nadoll[/color]