Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!fu-berlin.de!uni-berlin.de!not-for-mail
From: Jake Jarvis <pig_in_shoes@yahoo.com>
Newsgroups: comp.lang.javascript
Subject: Re: How to make a multiline alert?
Date: Wed, 21 Dec 2011 00:44:43 +0100
Lines: 43
Message-ID: <9lckvcF16aU1@mid.uni-berlin.de>
References: <c23c39d1-60f1-4155-a08f-df89e4cd36e8@g41g2000yqa.googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: news.uni-berlin.de 6tVNUmko6XGmN+Y/m2Y+DQu0G69nOQdBQyUgQGfeqaRkWya+4=
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:8.0) Gecko/20111105 Thunderbird/8.0
In-Reply-To: <c23c39d1-60f1-4155-a08f-df89e4cd36e8@g41g2000yqa.googlegroups.com>
Xref: x330-a1.tempe.blueboxinc.net comp.lang.javascript:9478

On 21.12.2011 00:09, Ted Byers wrote:
> Here is the beginning of the function:
>    print "function validateFormData(vtf2) {
>             var x = vtf2.ccn.value
>             var msg = \"\";
>             var newline = \'CR\';
>             if (x==null || x==\"\") {
>               vtf2.ccn.bgColor=\"lightred\";
>               msg.concat(\"\\r\\n\",\"Credit card number must be
> provided\");
>             }
>             if (!isNumber(x)) {
>               msg.concat(\"\\r\\n\",\"Credit card number must be a
> number\");
>             }
>             x = vtf2.ccexp.value
>             if (x==null || x==\"\") {
>               msg.concat(\"\\r\\n\",\"Credit card expiry date must be
> provided\");
>               alert(msg);
>               return false;
>             }
>
> I managed to get this function to be executed, but it only displays
> the first "Credit card number must be provided", but not the second

Please post just the (complete) output source code.

> "Credit card expiry date must be provided'.  The concatenation looks
> like it is working, at least the first time.  But what can be the

That is impossible for the (incomplete) piece of code you posted, the 
'concat' method returns a new string and you never assign again to 'msg'.

> problem.  Is there a limit t the number of times concat can be called
> on a string, or is alert limited in terms of the number of lines of
> text it can display?
>
> Any insights that can be provided would be appreciated.
>

-- 
Jake Jarvis