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NNTP-Posting-Date: Mon, 31 Dec 2012 17:07:17 -0600
From: Mike Filbin <michael.filbin@gmail.com>
Newsgroups: comp.lang.javascript
Date: Mon, 31 Dec 2012 16:07:18 -0700
Message-ID: <2012123116071843163-michaelfilbin@gmailcom>
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Subject: Re: Question on form validation
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Can you move your validation server-side? If your form is rendered 
statically, the user can disable JavaScript to bypass your validation 
script. Also, just a quick tip. Cache your reference to 
'Form1.FieldName'. It is generally bad practice to resolve the same DOM 
node twice. You can cache it like so:

var field = Form1.FieldName;

And then refer to it as

 // Use triple equal for type corherced comparisons. Double euqals can 
give unexpected results
if (field.value === ""){
 	…
	field.focus();
	...
} else {
	...
}

On 2012-12-19 14:57:35 +0000, bravesplace@gmail.com said:

> I use the following to determine if a field is blank and to alert them 
> the field is required:
> 
> if (Form1.FieldName.value == "")
>   {
>     alert("Please enter a value for the  FIELDNAME field.");
>     Form1.FieldName.focus();
>     return (false);
>   }
> 
> How can I use a LIKE type of statement so if they use a word we cannot 
> allow such as "Stupid", I can advise them the word is not permitted?